Import WebKit commit 85c24b4e854b971f0705bb3411cfd4c0b821f491

Change-Id: I3f9320f43d5d1fc5169a6c1b9dcea454974d6578
Reviewed-by: Konstantin Tokarev <annulen@yandex.ru>

44 files changed, 430 insertions, 200 deletions

diff --git a/Source/WebCore/Scripts/make-js-file-arrays.py b/Source/JavaScriptCore/Scripts/make-js-file-arrays.py
index 3116a11bb..65056646a 100755
--- a/Source/WebCore/Scripts/make-js-file-arrays.py
+++ b/Source/JavaScriptCore/Scripts/make-js-file-arrays.py
@@ -41,24 +41,30 @@ def chunk(list, chunkSize):
 
 
 def main():
-    parser = OptionParser(usage="usage: %prog [--no-minify] header source [input [input...]]")
+    parser = OptionParser(usage="usage: %prog [options] header source [input [input...]]")
     parser.add_option('--no-minify', action='store_true', help='Do not run the input files through jsmin')
+    parser.add_option('-n', '--namespace', help='Namespace to use')
     (options, arguments) = parser.parse_args()
+    if not options.namespace:
+        print 'Error: must provide a namespace'
+        parser.print_usage()
+        exit(-1)
     if len(arguments) < 3:
         print 'Error: must provide at least 3 arguments'
         parser.print_usage()
         exit(-1)
 
+    namespace = options.namespace
     headerPath = arguments[0]
     sourcePath = arguments[1]
     inputPaths = arguments[2:]
 
     headerFile = open(headerPath, 'w')
-    print >> headerFile, 'namespace WebCore {'
+    print >> headerFile, 'namespace {0:s} {{'.format(namespace)
 
     sourceFile = open(sourcePath, 'w')
     print >> sourceFile, '#include "{0:s}"'.format(os.path.basename(headerPath))
-    print >> sourceFile, 'namespace WebCore {'
+    print >> sourceFile, 'namespace {0:s} {{'.format(namespace)
 
     jsm = JavascriptMinify()
 
@@ -84,8 +90,8 @@ def main():
 
         print >> sourceFile, '};'
 
-    print >> headerFile, '}'
-    print >> sourceFile, '}'
+    print >> headerFile, '}} // namespace {0:s}'.format(namespace)
+    print >> sourceFile, '}} // namespace {0:s}'.format(namespace)
 
 if __name__ == '__main__':
     main()
diff --git a/Source/JavaScriptCore/runtime/JSGlobalObject.cpp b/Source/JavaScriptCore/runtime/JSGlobalObject.cpp
index 9e613a212..7d57590b4 100644
--- a/Source/JavaScriptCore/runtime/JSGlobalObject.cpp
+++ b/Source/JavaScriptCore/runtime/JSGlobalObject.cpp
@@ -458,7 +458,10 @@ m_ ## lowerName ## Prototype->putDirectWithoutTransition(vm, vm.propertyNames->c
     putDirectWithoutTransition(vm, vm.propertyNames->TypeError, m_typeErrorConstructor.get(), DontEnum);
     putDirectWithoutTransition(vm, vm.propertyNames->URIError, m_URIErrorConstructor.get(), DontEnum);
 
+#if !PLATFORM(QT)
+    // Disable ES6 Proxy because our implementation is not compliant with what real world code expects
     putDirectWithoutTransition(vm, vm.propertyNames->Proxy, ProxyConstructor::create(vm, ProxyConstructor::createStructure(vm, this, m_functionPrototype.get())), DontEnum);
+#endif
     
     
 #define PUT_CONSTRUCTOR_FOR_SIMPLE_TYPE(capitalName, lowerName, properName, instanceType, jsName) \
diff --git a/Source/WTF/wtf/DateMath.cpp b/Source/WTF/wtf/DateMath.cpp
index ebcecac6e..80086b379 100644
--- a/Source/WTF/wtf/DateMath.cpp
+++ b/Source/WTF/wtf/DateMath.cpp
@@ -84,6 +84,7 @@
 #include <limits>
 #include <stdint.h>
 #include <time.h>
+#include <wtf/Optional.h>
 #include <wtf/text/StringBuilder.h>
 
 #if OS(WINDOWS)
@@ -892,13 +893,10 @@ double parseDateFromNullTerminatedCharacters(const char* dateString, bool& haveT
         return std::numeric_limits<double>::quiet_NaN();
     dateString = newPosStr;
 
-    if (!*dateString)
-        return std::numeric_limits<double>::quiet_NaN();
-
     if (day < 0)
         return std::numeric_limits<double>::quiet_NaN();
 
-    int year = 0;
+    Optional<int> year;
     if (day > 31) {
         // ### where is the boundary and what happens below?
         if (*dateString != '/')
@@ -962,9 +960,11 @@ double parseDateFromNullTerminatedCharacters(const char* dateString, bool& haveT
         return std::numeric_limits<double>::quiet_NaN();
 
     // '99 23:12:40 GMT'
-    if (year <= 0 && *dateString) {
-        if (!parseInt(dateString, &newPosStr, 10, &year))
+    if (*dateString && !year) {
+        int result = 0;
+        if (!parseInt(dateString, &newPosStr, 10, &result))
             return std::numeric_limits<double>::quiet_NaN();
+        year = result;
     }
 
     // Don't fail if the time is missing.
@@ -979,7 +979,7 @@ double parseDateFromNullTerminatedCharacters(const char* dateString, bool& haveT
             if (*newPosStr != ':')
                 return std::numeric_limits<double>::quiet_NaN();
             // There was no year; the number was the hour.
-            year = -1;
+            year = Nullopt;
         } else {
             // in the normal case (we parsed the year), advance to the next number
             dateString = ++newPosStr;
@@ -1049,9 +1049,11 @@ double parseDateFromNullTerminatedCharacters(const char* dateString, bool& haveT
     }
     
     // The year may be after the time but before the time zone.
-    if (isASCIIDigit(*dateString) && year == -1) {
-        if (!parseInt(dateString, &newPosStr, 10, &year))
+    if (isASCIIDigit(*dateString) && !year) {
+        int result = 0;
+        if (!parseInt(dateString, &newPosStr, 10, &result))
             return std::numeric_limits<double>::quiet_NaN();
+        year = result;
         dateString = newPosStr;
         skipSpacesAndComments(dateString);
     }
@@ -1103,9 +1105,11 @@ double parseDateFromNullTerminatedCharacters(const char* dateString, bool& haveT
 
     skipSpacesAndComments(dateString);
 
-    if (*dateString && year == -1) {
-        if (!parseInt(dateString, &newPosStr, 10, &year))
+    if (*dateString && !year) {
+        int result = 0;
+        if (!parseInt(dateString, &newPosStr, 10, &result))
             return std::numeric_limits<double>::quiet_NaN();
+        year = result;
         dateString = newPosStr;
         skipSpacesAndComments(dateString);
     }
@@ -1115,14 +1119,28 @@ double parseDateFromNullTerminatedCharacters(const char* dateString, bool& haveT
         return std::numeric_limits<double>::quiet_NaN();
 
     // Y2K: Handle 2 digit years.
-    if (year >= 0 && year < 100) {
-        if (year < 50)
-            year += 2000;
-        else
-            year += 1900;
+    if (year) {
+        int yearValue = year.value();
+        if (yearValue >= 0 && yearValue < 100) {
+            if (yearValue < 50)
+                yearValue += 2000;
+            else
+                yearValue += 1900;
+        }
+        year = yearValue;
+    } else {
+        // We select 2000 as default value. This is because of the following reasons.
+        // 1. Year 2000 was used for the initial value of the variable `year`. While it won't be posed to users in WebKit,
+        //    V8 used this 2000 as its default value. (As of April 2017, V8 is using the year 2001 and Spider Monkey is
+        //    not doing this kind of fallback.)
+        // 2. It is a leap year. When using `new Date("Feb 29")`, we assume that people want to save month and day.
+        //    Leap year can save user inputs if they is valid. If we use the current year instead, the current year
+        //    may not be a leap year. In that case, `new Date("Feb 29").getMonth()` becomes 2 (March).
+        year = 2000;
     }
+    ASSERT(year);
     
-    return ymdhmsToSeconds(year, month + 1, day, hour, minute, second) * msPerSecond;
+    return ymdhmsToSeconds(year.value(), month + 1, day, hour, minute, second) * msPerSecond;
 }
 
 double parseDateFromNullTerminatedCharacters(const char* dateString)
diff --git a/Source/WTF/wtf/PlatformQt.cmake b/Source/WTF/wtf/PlatformQt.cmake
index 32c8d2c70..684119455 100644
--- a/Source/WTF/wtf/PlatformQt.cmake
+++ b/Source/WTF/wtf/PlatformQt.cmake
@@ -4,7 +4,7 @@ list(APPEND WTF_SOURCES
 
     text/qt/StringQt.cpp
 )
-QTWEBKIT_GENERATE_MOC_FILES_CPP(qt/MainThreadQt.cpp qt/RunLoopQt.cpp)
+QTWEBKIT_GENERATE_MOC_FILES_CPP(WTF qt/MainThreadQt.cpp qt/RunLoopQt.cpp)
 
 list(APPEND WTF_SYSTEM_INCLUDE_DIRECTORIES
     ${Qt5Core_INCLUDE_DIRS}
@@ -33,7 +33,7 @@ if (UNIX AND NOT APPLE)
 
         qt/WorkQueueQt.cpp
     )
-    QTWEBKIT_GENERATE_MOC_FILES_CPP(qt/WorkQueueQt.cpp)
+    QTWEBKIT_GENERATE_MOC_FILES_CPP(WTF qt/WorkQueueQt.cpp)
 endif ()
 
 if (USE_GLIB)
diff --git a/Source/WTF/wtf/text/StringImpl.h b/Source/WTF/wtf/text/StringImpl.h
index 5781c1c08..a1be75637 100644
--- a/Source/WTF/wtf/text/StringImpl.h
+++ b/Source/WTF/wtf/text/StringImpl.h
@@ -619,25 +619,7 @@ public:
             *destination = *source;
             return;
         }
-
-        if (numCharacters <= s_copyCharsInlineCutOff) {
-            unsigned i = 0;
-#if (CPU(X86) || CPU(X86_64))
-            const unsigned charsPerInt = sizeof(uint32_t) / sizeof(T);
-
-            if (numCharacters > charsPerInt) {
-                unsigned stopCount = numCharacters & ~(charsPerInt - 1);
-
-                const uint32_t* srcCharacters = reinterpret_cast<const uint32_t*>(source);
-                uint32_t* destCharacters = reinterpret_cast<uint32_t*>(destination);
-                for (unsigned j = 0; i < stopCount; i += charsPerInt, ++j)
-                    destCharacters[j] = srcCharacters[j];
-            }
-#endif
-            for (; i < numCharacters; ++i)
-                destination[i] = source[i];
-        } else
-            memcpy(destination, source, numCharacters * sizeof(T));
+        memcpy(destination, source, numCharacters * sizeof(T));
     }
 
     ALWAYS_INLINE static void copyChars(UChar* destination, const LChar* source, unsigned numCharacters)
@@ -855,9 +837,6 @@ private:
         return *tailPointer<StringImpl*>();
     }
 
-    // This number must be at least 2 to avoid sharing empty, null as well as 1 character strings from SmallStrings.
-    static const unsigned s_copyCharsInlineCutOff = 20;
-
     enum class CaseConvertType { Upper, Lower };
     template<CaseConvertType type, typename CharacterType> static Ref<StringImpl> convertASCIICase(StringImpl&, const CharacterType*, unsigned);
 
diff --git a/Source/WTF/wtf/win/WorkItemWin.cpp b/Source/WTF/wtf/win/WorkItemWin.cpp
index 33ddf8ed9..7a67ecfaf 100644
--- a/Source/WTF/wtf/win/WorkItemWin.cpp
+++ b/Source/WTF/wtf/win/WorkItemWin.cpp
@@ -26,7 +26,6 @@
 #include "config.h"
 #include "WorkItemWin.h"
 
-#include <Windows.h>
 #include <wtf/Threading.h>
 #include <wtf/WorkQueue.h>
 
diff --git a/Source/WTF/wtf/win/WorkItemWin.h b/Source/WTF/wtf/win/WorkItemWin.h
index af3fa1799..92308d832 100644
--- a/Source/WTF/wtf/win/WorkItemWin.h
+++ b/Source/WTF/wtf/win/WorkItemWin.h
@@ -27,8 +27,8 @@
 #ifndef WorkItemWin_h
 #define WorkItemWin_h
 
-#include <Windows.h>
 #include <functional>
+#include <windows.h>
 #include <wtf/RefPtr.h>
 #include <wtf/ThreadSafeRefCounted.h>
 
diff --git a/Source/WebCore/CMakeLists.txt b/Source/WebCore/CMakeLists.txt
index 7d0ad0433..e1efb9991 100644
--- a/Source/WebCore/CMakeLists.txt
+++ b/Source/WebCore/CMakeLists.txt
@@ -3558,9 +3558,11 @@ if (WebCore_USER_AGENT_SCRIPTS)
     MAKE_JS_FILE_ARRAYS(
         ${DERIVED_SOURCES_WEBCORE_DIR}/UserAgentScriptsData.cpp
         ${DERIVED_SOURCES_WEBCORE_DIR}/UserAgentScripts.h
+        WebCore
         WebCore_USER_AGENT_SCRIPTS
         WebCore_USER_AGENT_SCRIPTS_DEPENDENCIES
     )
+    list(APPEND WebCore_DERIVED_SOURCES ${DERIVED_SOURCES_WEBCORE_DIR}/UserAgentScriptsData.cpp)
 endif ()
 
 # Generate plug-in resources
diff --git a/Source/WebCore/PlatformQt.cmake b/Source/WebCore/PlatformQt.cmake
index c5466b6c7..f0e68cf9e 100644
--- a/Source/WebCore/PlatformQt.cmake
+++ b/Source/WebCore/PlatformQt.cmake
@@ -110,6 +110,7 @@ list(APPEND WebCore_SOURCES
     platform/network/NetworkStorageSessionStub.cpp
     platform/network/MIMESniffing.cpp
 
+    platform/network/qt/BlobUrlConversion.cpp
     platform/network/qt/CookieJarQt.cpp
     platform/network/qt/CredentialStorageQt.cpp
     platform/network/qt/DNSQt.cpp
@@ -162,19 +163,19 @@ list(APPEND WebCore_SOURCES
     platform/text/qt/TextBreakIteratorInternalICUQt.cpp
 )
 
-QTWEBKIT_GENERATE_MOC_FILES_CPP(
+QTWEBKIT_GENERATE_MOC_FILES_CPP(WebCore
     platform/network/qt/DNSQt.cpp
     platform/qt/MainThreadSharedTimerQt.cpp
 )
 
-QTWEBKIT_GENERATE_MOC_FILES_H(
+QTWEBKIT_GENERATE_MOC_FILES_H(WebCore
     platform/network/qt/CookieJarQt.h
     platform/network/qt/QNetworkReplyHandler.h
     platform/network/qt/QtMIMETypeSniffer.h
 )
 
-QTWEBKIT_GENERATE_MOC_FILE_H(platform/network/qt/NetworkStateNotifierPrivate.h platform/network/qt/NetworkStateNotifierQt.cpp)
-QTWEBKIT_GENERATE_MOC_FILE_H(platform/network/qt/SocketStreamHandlePrivate.h platform/network/qt/SocketStreamHandleQt.cpp)
+QTWEBKIT_GENERATE_MOC_FILE_H(WebCore platform/network/qt/NetworkStateNotifierPrivate.h platform/network/qt/NetworkStateNotifierQt.cpp)
+QTWEBKIT_GENERATE_MOC_FILE_H(WebCore platform/network/qt/SocketStreamHandlePrivate.h platform/network/qt/SocketStreamHandleQt.cpp)
 
 if (COMPILER_IS_GCC_OR_CLANG)
     set_source_files_properties(
@@ -182,6 +183,12 @@ if (COMPILER_IS_GCC_OR_CLANG)
     PROPERTIES
         COMPILE_FLAGS "-frtti -UQT_NO_DYNAMIC_CAST"
     )
+
+    set_source_files_properties(
+        platform/network/qt/BlobUrlConversion.cpp
+    PROPERTIES
+        COMPILE_FLAGS "-fexceptions -UQT_NO_EXCEPTIONS"
+    )
 endif ()
 
 if (ENABLE_DEVICE_ORIENTATION)
@@ -197,7 +204,7 @@ if (ENABLE_GAMEPAD_DEPRECATED)
     list(APPEND WebCore_SOURCES
         platform/qt/GamepadsQt.cpp
     )
-    QTWEBKIT_GENERATE_MOC_FILES_CPP(platform/qt/GamepadsQt.cpp)
+    QTWEBKIT_GENERATE_MOC_FILES_CPP(WebCore platform/qt/GamepadsQt.cpp)
 endif ()
 
 if (ENABLE_GRAPHICS_CONTEXT_3D)
@@ -221,7 +228,7 @@ if (ENABLE_NETSCAPE_PLUGIN_API)
             platform/win/WebCoreInstanceHandle.cpp
         )
         list(APPEND WebCore_LIBRARIES
-            Shlwapi
+            shlwapi
             version
         )
     elseif (PLUGIN_BACKEND_XLIB)
@@ -374,7 +381,7 @@ if (USE_QT_MULTIMEDIA)
     list(APPEND WebCore_LIBRARIES
         ${Qt5Multimedia_LIBRARIES}
     )
-    QTWEBKIT_GENERATE_MOC_FILES_H(platform/graphics/qt/MediaPlayerPrivateQt.h)
+    QTWEBKIT_GENERATE_MOC_FILES_H(WebCore platform/graphics/qt/MediaPlayerPrivateQt.h)
 endif ()
 
 if (ENABLE_VIDEO)
diff --git a/Source/WebCore/bridge/qt/qt_class.cpp b/Source/WebCore/bridge/qt/qt_class.cpp
index 5efebc0fd..1554f8d63 100644
--- a/Source/WebCore/bridge/qt/qt_class.cpp
+++ b/Source/WebCore/bridge/qt/qt_class.cpp
@@ -108,7 +108,7 @@ JSValue QtClass::fallbackObject(ExecState* exec, Instance* inst, PropertyName id
         return jsUndefined();
 
     int flags = metaMethod.methodType() == QMetaMethod::Signal ? QtRuntimeMethod::MethodIsSignal : 0;
-    QtRuntimeMethod* method = new QtRuntimeMethod(context, static_cast<QtInstance*>(inst)->getObject(), normal, index, flags, qtinst);
+    QtRuntimeMethod* method = new QtRuntimeMethod(static_cast<QtInstance*>(inst)->getObject(), normal, index, flags, qtinst);
     qtinst->m_methods.insert(name, method);
     JSValue obj = toJS(method->jsObjectRef(context, &exception));
     if (exception)
diff --git a/Source/WebCore/bridge/qt/qt_runtime.cpp b/Source/WebCore/bridge/qt/qt_runtime.cpp
index 84335e8ca..4859faee3 100644
--- a/Source/WebCore/bridge/qt/qt_runtime.cpp
+++ b/Source/WebCore/bridge/qt/qt_runtime.cpp
@@ -1230,7 +1230,7 @@ static JSClassRef prototypeForSignalsAndSlots()
     return cls;
 }
 
-QtRuntimeMethod::QtRuntimeMethod(JSContextRef ctx, QObject* object, const QByteArray& identifier, int index, int flags, QtInstance* instance)
+QtRuntimeMethod::QtRuntimeMethod(QObject* object, const QByteArray& identifier, int index, int flags, QtInstance* instance)
     : m_object(object)
     , m_identifier(identifier)
     , m_index(index)
diff --git a/Source/WebCore/bridge/qt/qt_runtime.h b/Source/WebCore/bridge/qt/qt_runtime.h
index 34a97244a..c9d675c3f 100644
--- a/Source/WebCore/bridge/qt/qt_runtime.h
+++ b/Source/WebCore/bridge/qt/qt_runtime.h
@@ -84,7 +84,7 @@ public:
         AllowPrivate = 2
     };
 
-    QtRuntimeMethod(JSContextRef, QObject*, const QByteArray& identifier, int signalIndex, int flags, QtInstance*);
+    QtRuntimeMethod(QObject*, const QByteArray& identifier, int signalIndex, int flags, QtInstance*);
     ~QtRuntimeMethod();
 
     static JSValueRef call(JSContextRef ctx, JSObjectRef function, JSObjectRef thisObject, size_t argumentCount, const JSValueRef arguments[], JSValueRef* exception);
diff --git a/Source/WebCore/inspector/InspectorDOMAgent.cpp b/Source/WebCore/inspector/InspectorDOMAgent.cpp
index ef9bb394e..82d35c1a8 100644
--- a/Source/WebCore/inspector/InspectorDOMAgent.cpp
+++ b/Source/WebCore/inspector/InspectorDOMAgent.cpp
@@ -1446,7 +1446,7 @@ Ref<Inspector::Protocol::DOM::EventListener> InspectorDOMAgent::buildObjectForEv
         JSC::JSLockHolder lock(scriptListener->isolatedWorld().vm());
         state = execStateFromNode(scriptListener->isolatedWorld(), &node->document());
         handler = scriptListener->jsFunction(&node->document());
-        if (handler) {
+        if (handler && state) {
             body = handler->toString(state)->value(state);
             if (auto function = JSC::jsDynamicCast<JSC::JSFunction*>(handler)) {
                 if (!function->isHostOrBuiltinFunction()) {
diff --git a/Source/WebCore/loader/cache/CachedResourceLoader.cpp b/Source/WebCore/loader/cache/CachedResourceLoader.cpp
index 35127c647..fb4a63e0b 100644
--- a/Source/WebCore/loader/cache/CachedResourceLoader.cpp
+++ b/Source/WebCore/loader/cache/CachedResourceLoader.cpp
@@ -823,10 +823,17 @@ CachedResourceLoader::RevalidationPolicy CachedResourceLoader::determineRevalida
         logMemoryCacheResourceRequest(frame(), DiagnosticLoggingKeys::inMemoryCacheKey(), DiagnosticLoggingKeys::unusedReasonErrorKey());
         return Reload;
     }
-    
-    // For resources that are not yet loaded we ignore the cache policy.
-    if (existingResource->isLoading())
+
+    if (existingResource->isLoading()) {
+        // Do not use cached main resources that are still loading because sharing
+        // loading CachedResources in this case causes issues with regards to cancellation.
+        // If one of the DocumentLoader clients decides to cancel the load, then the load
+        // would be cancelled for all other DocumentLoaders as well.
+        if (type == CachedResource::Type::MainResource)
+            return Reload;
+        // For cached subresources that are still loading we ignore the cache policy.
         return Use;
+    }
 
     auto revalidationDecision = existingResource->makeRevalidationDecision(cachePolicy(type));
     logResourceRevalidationDecision(revalidationDecision, frame());
diff --git a/Source/WebCore/platform/graphics/opengl/TemporaryOpenGLSetting.cpp b/Source/WebCore/platform/graphics/opengl/TemporaryOpenGLSetting.cpp
index c502a0c3b..8ae96b94c 100644
--- a/Source/WebCore/platform/graphics/opengl/TemporaryOpenGLSetting.cpp
+++ b/Source/WebCore/platform/graphics/opengl/TemporaryOpenGLSetting.cpp
@@ -29,7 +29,11 @@
 #if ENABLE(GRAPHICS_CONTEXT_3D)
 #include "TemporaryOpenGLSetting.h"
 
-#if USE(OPENGL_ES_2)
+#if PLATFORM(QT)
+#define FUNCTIONS m_functions
+#include "OpenGLShimsQt.h"
+#define glIsEnabled(...) m_functions->glIsEnabled(__VA_ARGS__)
+#elif USE(OPENGL_ES_2)
 #include <GLES2/gl2.h>
 #include "OpenGLESShims.h"
 #elif PLATFORM(IOS)
@@ -38,10 +42,6 @@
 #include <OpenGL/gl.h>
 #elif PLATFORM(GTK) || PLATFORM(EFL) || PLATFORM(WIN)
 #include "OpenGLShims.h"
-#elif PLATFORM(QT)
-#define FUNCTIONS m_functions
-#include "OpenGLShimsQt.h"
-#define glIsEnabled(...) m_functions->glIsEnabled(__VA_ARGS__)
 #endif
 
 namespace WebCore {
diff --git a/Source/WebCore/platform/network/qt/BlobUrlConversion.cpp b/Source/WebCore/platform/network/qt/BlobUrlConversion.cpp
new file mode 100644
index 000000000..8f61eaeb9
--- /dev/null
+++ b/Source/WebCore/platform/network/qt/BlobUrlConversion.cpp
@@ -0,0 +1,98 @@
+/*
+    Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies)
+    Copyright (C) 2017 Konstantin Tokarev <annulen@yandex.ru>
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Library General Public
+    License as published by the Free Software Foundation; either
+    version 2 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Library General Public License for more details.
+
+    You should have received a copy of the GNU Library General Public License
+    along with this library; see the file COPYING.LIB.  If not, write to
+    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+    Boston, MA 02110-1301, USA.
+*/
+
+#include "config.h"
+#include "BlobUrlConversion.h"
+
+#include "BlobData.h"
+#include "BlobRegistryImpl.h"
+
+#include <QUrl>
+#include <wtf/text/Base64.h>
+
+namespace WebCore {
+
+static bool appendBlobResolved(Vector<char>& out, const URL& url, QString* contentType = 0)
+{
+    RefPtr<BlobData> blobData = static_cast<BlobRegistryImpl&>(blobRegistry()).getBlobDataFromURL(url);
+    if (!blobData)
+        return false;
+
+    if (contentType)
+        *contentType = blobData->contentType();
+
+    BlobDataItemList::const_iterator it = blobData->items().begin();
+    const BlobDataItemList::const_iterator itend = blobData->items().end();
+    for (; it != itend; ++it) {
+        const BlobDataItem& blobItem = *it;
+        if (blobItem.type() == BlobDataItem::Type::Data) {
+            if (!out.tryAppend(reinterpret_cast<const char*>(blobItem.data().data()->data()) + blobItem.offset(), blobItem.length()))
+                return false;
+        } else if (blobItem.type() == BlobDataItem::Type::File) {
+            // File types are not allowed here, so just ignore it.
+            RELEASE_ASSERT_WITH_MESSAGE(false, "File types are not allowed here");
+        } else
+            ASSERT_NOT_REACHED();
+    }
+    return true;
+}
+
+static QUrl resolveBlobUrl(const URL& url)
+{
+    RefPtr<BlobData> blobData = static_cast<BlobRegistryImpl&>(blobRegistry()).getBlobDataFromURL(url);
+    if (!blobData)
+        return QUrl();
+
+    Vector<char> data;
+    QString contentType;
+    if (!appendBlobResolved(data, url, &contentType)) {
+        qWarning("Failed to convert blob data to base64: cannot allocate memory for continuous blob data");
+        return QUrl();
+    }
+
+    // QByteArray::{from,to}Base64 are prone to integer overflow, this is the maximum size that can be safe
+    size_t maxBase64Size = std::numeric_limits<int>::max() / 3 - 1;
+
+    Vector<char> base64;
+    WTF::base64Encode(data, base64, WTF::Base64URLPolicy);
+    if (base64.isEmpty() || base64.size() > maxBase64Size) {
+        qWarning("Failed to convert blob data to base64: data is too large");
+        return QUrl();
+    }
+
+    QString dataUri(QStringLiteral("data:"));
+    dataUri.append(contentType);
+    dataUri.append(QStringLiteral(";base64,"));
+    dataUri.reserve(dataUri.size() + base64.size());
+    dataUri.append(QLatin1String(base64.data(), base64.size()));
+    return QUrl(dataUri);
+}
+
+QUrl convertBlobToDataUrl(const QUrl& url)
+{
+    QT_TRY {
+        return resolveBlobUrl(url);
+    } QT_CATCH(const std::bad_alloc &) {
+        qWarning("Failed to convert blob data to base64: not enough memory");
+    }
+    return QUrl();
+}
+
+} // namespace WebCore
diff --git a/Source/WebCore/platform/network/qt/BlobUrlConversion.h b/Source/WebCore/platform/network/qt/BlobUrlConversion.h
new file mode 100644
index 000000000..2dbd0a680
--- /dev/null
+++ b/Source/WebCore/platform/network/qt/BlobUrlConversion.h
@@ -0,0 +1,29 @@
+/*
+    Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies)
+    Copyright (C) 2017 Konstantin Tokarev <annulen@yandex.ru>
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Library General Public
+    License as published by the Free Software Foundation; either
+    version 2 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Library General Public License for more details.
+
+    You should have received a copy of the GNU Library General Public License
+    along with this library; see the file COPYING.LIB.  If not, write to
+    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+    Boston, MA 02110-1301, USA.
+*/
+
+QT_BEGIN_NAMESPACE
+class QUrl;
+QT_END_NAMESPACE
+
+namespace WebCore {
+
+QUrl convertBlobToDataUrl(const QUrl&);
+
+}
diff --git a/Source/WebCore/platform/network/qt/CookieJarQt.cpp b/Source/WebCore/platform/network/qt/CookieJarQt.cpp
index 3b08c06cd..d1cf87fdd 100644
--- a/Source/WebCore/platform/network/qt/CookieJarQt.cpp
+++ b/Source/WebCore/platform/network/qt/CookieJarQt.cpp
@@ -42,12 +42,21 @@
 #include <QNetworkCookie>
 #include <QStringList>
 #include <QVariant>
+#include <wtf/text/StringBuilder.h>
 #include <wtf/text/WTFString.h>
 
 namespace WebCore {
 
 static SharedCookieJarQt* s_sharedCookieJarQt = 0;
 
+static void appendCookie(StringBuilder& builder, const QNetworkCookie& cookie)
+{
+    if (!builder.isEmpty())
+        builder.append("; ");
+    QByteArray rawData = cookie.toRawForm(QNetworkCookie::NameAndValueOnly);
+    builder.append(rawData.constData(), rawData.length());
+}
+
 void setCookiesFromDOM(const NetworkStorageSession& session, const URL& firstParty, const URL& url, const String& value)
 {
     QNetworkCookieJar* jar = session.context() ? session.context()->networkAccessManager()->cookieJar() : SharedCookieJarQt::shared();
@@ -59,7 +68,8 @@ void setCookiesFromDOM(const NetworkStorageSession& session, const URL& firstPar
     if (!thirdPartyCookiePolicyPermits(session.context(), urlForCookies, firstPartyUrl))
         return;
 
-    QList<QNetworkCookie> cookies = QNetworkCookie::parseCookies(QString(value).toLatin1());
+    CString cookieString = value.latin1();
+    QList<QNetworkCookie> cookies = QNetworkCookie::parseCookies(QByteArray::fromRawData(cookieString.data(), cookieString.length()));
     QList<QNetworkCookie>::Iterator it = cookies.begin();
     while (it != cookies.end()) {
         if (it->isHttpOnly())
@@ -86,14 +96,13 @@ String cookiesForDOM(const NetworkStorageSession& session, const URL& firstParty
     if (cookies.isEmpty())
         return String();
 
-    QStringList resultCookies;
-    foreach (const QNetworkCookie& networkCookie, cookies) {
-        if (networkCookie.isHttpOnly())
+    StringBuilder builder;
+    for (const auto& cookie : cookies) {
+        if (cookie.isHttpOnly())
             continue;
-        resultCookies.append(QString::fromLatin1(networkCookie.toRawForm(QNetworkCookie::NameAndValueOnly).constData()));
+        appendCookie(builder, cookie);
     }
-
-    return resultCookies.join(QLatin1String("; "));
+    return builder.toString();
 }
 
 String cookieRequestHeaderFieldValue(const NetworkStorageSession& session, const URL& /*firstParty*/, const URL& url)
@@ -106,11 +115,10 @@ String cookieRequestHeaderFieldValue(const NetworkStorageSession& session, const
     if (cookies.isEmpty())
         return String();
 
-    QStringList resultCookies;
-    foreach (QNetworkCookie networkCookie, cookies)
-        resultCookies.append(QString::fromLatin1(networkCookie.toRawForm(QNetworkCookie::NameAndValueOnly).constData()));
-
-    return resultCookies.join(QLatin1String("; "));
+    StringBuilder builder;
+    for (const auto& cookie : cookies)
+        appendCookie(builder, cookie);
+    return builder.toString();
 }
 
 bool cookiesEnabled(const NetworkStorageSession& session, const URL& /*firstParty*/, const URL& /*url*/)
diff --git a/Source/WebCore/platform/network/qt/QNetworkReplyHandler.cpp b/Source/WebCore/platform/network/qt/QNetworkReplyHandler.cpp
index cd096bfe7..1b60c5131 100644
--- a/Source/WebCore/platform/network/qt/QNetworkReplyHandler.cpp
+++ b/Source/WebCore/platform/network/qt/QNetworkReplyHandler.cpp
@@ -647,7 +647,10 @@ void QNetworkReplyHandler::redirect(ResourceResponse& response, const QUrl& redi
 {
     ASSERT(!m_queue.deferSignals());
 
-    QUrl newUrl = m_replyWrapper->reply()->url().resolved(redirection);
+    QUrl currentUrl = m_replyWrapper->reply()->url();
+    QUrl newUrl = currentUrl.resolved(redirection);
+    if (currentUrl.hasFragment())
+        newUrl.setFragment(currentUrl.fragment());
 
     ResourceHandleClient* client = m_resourceHandle->client();
     ASSERT(client);
diff --git a/Source/WebCore/platform/network/qt/ResourceRequestQt.cpp b/Source/WebCore/platform/network/qt/ResourceRequestQt.cpp
index 655724a4c..b7f9447bc 100644
--- a/Source/WebCore/platform/network/qt/ResourceRequestQt.cpp
+++ b/Source/WebCore/platform/network/qt/ResourceRequestQt.cpp
@@ -18,14 +18,11 @@
 */
 
 #include "config.h"
-#include "NetworkingContext.h"
 #include "ResourceRequest.h"
-#include "ThirdPartyCookiesQt.h"
-
-#include "BlobData.h"
-#include "BlobRegistryImpl.h"
 
-#include <qglobal.h>
+#include "BlobUrlConversion.h"
+#include "NetworkingContext.h"
+#include "ThirdPartyCookiesQt.h"
 
 #include <QNetworkRequest>
 #include <QUrl>
@@ -43,44 +40,11 @@ unsigned initializeMaximumHTTPConnectionCountPerHost()
     return 6 * (1 + 3 + 2);
 }
 
-static void appendBlobResolved(QByteArray& data, const QUrl& url, QString* contentType = 0)
+static QUrl toQUrl(const URL& url)
 {
-    RefPtr<BlobData> blobData = static_cast<BlobRegistryImpl&>(blobRegistry()).getBlobDataFromURL(url);
-    if (!blobData)
-        return;
-
-    if (contentType)
-        *contentType = blobData->contentType();
-
-    BlobDataItemList::const_iterator it = blobData->items().begin();
-    const BlobDataItemList::const_iterator itend = blobData->items().end();
-    for (; it != itend; ++it) {
-        const BlobDataItem& blobItem = *it;
-        if (blobItem.type() == BlobDataItem::Type::Data)
-            data.append(reinterpret_cast<const char*>(blobItem.data().data()->data()) + static_cast<int>(blobItem.offset()), static_cast<int>(blobItem.length()));
-        else if (blobItem.type() == BlobDataItem::Type::File) {
-            // File types are not allowed here, so just ignore it.
-            RELEASE_ASSERT_WITH_MESSAGE(false, "File types are not allowed here");
-        } else
-            ASSERT_NOT_REACHED();
-    }
-}
-
-static void resolveBlobUrl(const QUrl& url, QUrl& resolvedUrl)
-{
-    RefPtr<BlobData> blobData = static_cast<BlobRegistryImpl&>(blobRegistry()).getBlobDataFromURL(url);
-    if (!blobData)
-        return;
-
-    QByteArray data;
-    QString contentType;
-    appendBlobResolved(data, url, &contentType);
-
-    QString dataUri(QStringLiteral("data:"));
-    dataUri.append(contentType);
-    dataUri.append(QStringLiteral(";base64,"));
-    dataUri.append(QString::fromLatin1(data.toBase64()));
-    resolvedUrl = QUrl(dataUri);
+    if (url.protocolIsBlob())
+        return convertBlobToDataUrl(url);
+    return url;
 }
 
 static inline QByteArray stringToByteArray(const String& string)
@@ -93,11 +57,7 @@ static inline QByteArray stringToByteArray(const String& string)
 QNetworkRequest ResourceRequest::toNetworkRequest(NetworkingContext *context) const
 {
     QNetworkRequest request;
-    QUrl newurl = url();
-
-    if (newurl.scheme() == QLatin1String("blob"))
-        resolveBlobUrl(url(), newurl);
-
+    QUrl newurl = toQUrl(url());
     request.setUrl(newurl);
     request.setOriginatingObject(context ? context->originatingObject() : 0);
 
diff --git a/Source/WebCore/platform/qt/UserAgentQt.cpp b/Source/WebCore/platform/qt/UserAgentQt.cpp
index 4b8876220..fc5eab7a8 100644
--- a/Source/WebCore/platform/qt/UserAgentQt.cpp
+++ b/Source/WebCore/platform/qt/UserAgentQt.cpp
@@ -37,7 +37,7 @@ namespace WebCore {
 
     This implementation returns the following value:
 
-    "Mozilla/5.0 (%Platform%%Security%%Subplatform%) AppleWebKit/%WebKitVersion% (KHTML, like Gecko) %AppVersion Version/9.0 Safari/%WebKitVersion%"
+    "Mozilla/5.0 (%Platform%%Security%%Subplatform%) AppleWebKit/%WebKitVersion% (KHTML, like Gecko) %AppVersion Version/10.0 Safari/%WebKitVersion%"
 
     In this string the following values are replaced the first time the function is called:
     \list
@@ -58,7 +58,7 @@ String UserAgentQt::standardUserAgent(const String &applicationNameForUserAgent,
 
     if (ua.isNull()) {
 
-        ua = QStringLiteral("Mozilla/5.0 (%1%2%3) AppleWebKit/%4 (KHTML, like Gecko) %99 Version/9.0 Safari/%5");
+        ua = QStringLiteral("Mozilla/5.0 (%1%2%3) AppleWebKit/%4 (KHTML, like Gecko) %99 Version/10.0 Safari/%5");
 
         // Platform.
         ua = ua.arg(
diff --git a/Source/WebCore/rendering/line/BreakingContext.h b/Source/WebCore/rendering/line/BreakingContext.h
index 799d2c063..fff452898 100644
--- a/Source/WebCore/rendering/line/BreakingContext.h
+++ b/Source/WebCore/rendering/line/BreakingContext.h
@@ -559,9 +559,9 @@ inline void BreakingContext::handleReplaced()
             m_ignoringSpaces = true;
         }
         if (downcast<RenderListMarker>(*m_current.renderer()).isInside())
-            m_width.addUncommittedWidth(replacedLogicalWidth);
+            m_width.addUncommittedReplacedWidth(replacedLogicalWidth);
     } else
-        m_width.addUncommittedWidth(replacedLogicalWidth);
+        m_width.addUncommittedReplacedWidth(replacedLogicalWidth);
     if (is<RenderRubyRun>(*m_current.renderer())) {
         m_width.applyOverhang(downcast<RenderRubyRun>(m_current.renderer()), m_lastObject, m_nextObject);
         downcast<RenderRubyRun>(m_current.renderer())->updatePriorContextFromCachedBreakIterator(m_renderTextInfo.lineBreakIterator);
@@ -748,7 +748,7 @@ inline bool BreakingContext::handleText(WordMeasurements& wordMeasurements, bool
     bool breakNBSP = m_autoWrap && m_currentStyle->nbspMode() == SPACE;
     // Auto-wrapping text should wrap in the middle of a word only if it could not wrap before the word,
     // which is only possible if the word is the first thing on the line.
-    bool breakWords = m_currentStyle->breakWords() && ((m_autoWrap && !m_width.hasCommitted()) || m_currWS == PRE);
+    bool breakWords = m_currentStyle->breakWords() && ((m_autoWrap && (!m_width.committedWidth() && !m_width.hasCommittedReplaced())) || m_currWS == PRE);
     bool midWordBreak = false;
     bool breakAll = m_currentStyle->wordBreak() == BreakAllWordBreak && m_autoWrap;
     bool keepAllWords = m_currentStyle->wordBreak() == KeepAllWordBreak;
diff --git a/Source/WebCore/rendering/line/LineWidth.cpp b/Source/WebCore/rendering/line/LineWidth.cpp
index 71e05cb23..b28406d63 100644
--- a/Source/WebCore/rendering/line/LineWidth.cpp
+++ b/Source/WebCore/rendering/line/LineWidth.cpp
@@ -128,6 +128,10 @@ void LineWidth::commit()
 {
     m_committedWidth += m_uncommittedWidth;
     m_uncommittedWidth = 0;
+    if (m_hasUncommittedReplaced) {
+        m_hasCommittedReplaced = true;
+        m_hasUncommittedReplaced = false;
+    }
     m_hasCommitted = true;
 }
 
diff --git a/Source/WebCore/rendering/line/LineWidth.h b/Source/WebCore/rendering/line/LineWidth.h
index 370b3a0f8..bcb274c8e 100644
--- a/Source/WebCore/rendering/line/LineWidth.h
+++ b/Source/WebCore/rendering/line/LineWidth.h
@@ -60,6 +60,7 @@ public:
     float logicalLeftOffset() const { return m_left; }
     
     bool hasCommitted() const { return m_hasCommitted; }
+    bool hasCommittedReplaced() const { return m_hasCommittedReplaced; }
 
     void updateAvailableWidth(LayoutUnit minimumHeight = 0);
     void shrinkAvailableWidthForNewFloatIfNeeded(const FloatingObject&);
@@ -67,6 +68,11 @@ public:
     {
         m_uncommittedWidth += delta;
     }
+    void addUncommittedReplacedWidth(float delta)
+    {
+        addUncommittedWidth(delta);
+        m_hasUncommittedReplaced = true;
+    }
     void commit();
     void applyOverhang(RenderRubyRun*, RenderObject* startRenderer, RenderObject* endRenderer);
     void fitBelowFloats(bool isFirstLine = false);
@@ -92,6 +98,8 @@ private:
     float m_availableWidth { 0 };
     bool m_isFirstLine { true };
     bool m_hasCommitted { false };
+    bool m_hasCommittedReplaced { false };
+    bool m_hasUncommittedReplaced { false };
     IndentTextOrNot m_shouldIndentText;
 };
 
diff --git a/Source/WebCore/svg/properties/SVGAnimatedListPropertyTearOff.h b/Source/WebCore/svg/properties/SVGAnimatedListPropertyTearOff.h
index 6177281c3..0fd56cc65 100644
--- a/Source/WebCore/svg/properties/SVGAnimatedListPropertyTearOff.h
+++ b/Source/WebCore/svg/properties/SVGAnimatedListPropertyTearOff.h
@@ -68,6 +68,8 @@ public:
             m_baseVal = nullptr;
         else if (&property == m_animVal)
             m_animVal = nullptr;
+        if (!m_baseVal && !m_animVal)
+            detachListWrappers(m_values.size());
     }
 
     int findItem(SVGProperty* property)
diff --git a/Source/WebKit/PlatformQt.cmake b/Source/WebKit/PlatformQt.cmake
index 3e50b2552..a192fbd48 100644
--- a/Source/WebKit/PlatformQt.cmake
+++ b/Source/WebKit/PlatformQt.cmake
@@ -16,10 +16,22 @@ macro(generate_version_header _file _var _prefix)
     set_source_files_properties(${_file} PROPERTIES GENERATED TRUE)
 endmacro()
 
+macro(append_lib_names_to_list _lib_names_list)
+    foreach (_lib_filename ${ARGN})
+        get_filename_component(_lib_name_we ${_lib_filename} NAME_WE)
+        if (NOT MSVC)
+            string(REGEX REPLACE "^lib" "" _lib_name_we ${_lib_name_we})
+        endif ()
+        list(APPEND ${_lib_names_list} ${_lib_name_we})
+    endforeach ()
+endmacro()
+
 if (${JavaScriptCore_LIBRARY_TYPE} MATCHES STATIC)
     add_definitions(-DSTATICALLY_LINKED_WITH_WTF -DSTATICALLY_LINKED_WITH_JavaScriptCore)
 endif ()
 
+QTWEBKIT_SKIP_AUTOMOC(WebKit)
+
 list(APPEND WebKit_INCLUDE_DIRECTORIES
     "${WEBCORE_DIR}"
     "${DERIVED_SOURCES_DIR}"
@@ -446,23 +458,21 @@ if (ENABLE_PRINT_SUPPORT)
 endif ()
 
 if (QT_STATIC_BUILD)
-    if (MSVC)
-        set(LIB_PREFIX "lib")
-    endif ()
     set(WEBKITWIDGETS_PKGCONGIG_DEPS "${WEBKITWIDGETS_PKGCONGIG_DEPS} Qt5PrintSupport")
     set(WEBKITWIDGETS_PRI_DEPS "${WEBKITWIDGETS_PRI_DEPS} printsupport")
-    set(EXTRA_LIBS_NAMES WebCore JavaScriptCore WTF xml2)
+    set(EXTRA_LIBS_NAMES WebCore JavaScriptCore WTF)
+    append_lib_names_to_list(EXTRA_LIBS_NAMES ${LIBXML2_LIBRARIES} ${SQLITE_LIBRARIES} ${ZLIB_LIBRARIES})
     if (NOT USE_SYSTEM_MALLOC)
         list(APPEND EXTRA_LIBS_NAMES bmalloc)
     endif ()
     if (ENABLE_XSLT)
-        list(APPEND EXTRA_LIBS_NAMES xslt)
+        append_lib_names_to_list(EXTRA_LIBS_NAMES ${LIBXSLT_LIBRARIES})
     endif ()
     if (USE_LIBHYPHEN)
-        list(APPEND EXTRA_LIBS_NAMES hyphen)
+        append_lib_names_to_list(EXTRA_LIBS_NAMES ${HYPHEN_LIBRARIES})
     endif ()
     if (USE_WEBP)
-        list(APPEND EXTRA_LIBS_NAMES webp)
+        append_lib_names_to_list(EXTRA_LIBS_NAMES ${WEBP_LIBRARIES})
     endif ()
     if (USE_WOFF2)
         list(APPEND EXTRA_LIBS_NAMES woff2 brotli)
@@ -470,6 +480,7 @@ if (QT_STATIC_BUILD)
     if (APPLE)
         list(APPEND EXTRA_LIBS_NAMES icucore)
     endif ()
+    list(REMOVE_DUPLICATES EXTRA_LIBS_NAMES)
     foreach (LIB_NAME ${EXTRA_LIBS_NAMES})
         set(WEBKIT_PKGCONGIG_DEPS "${WEBKIT_PKGCONGIG_DEPS} ${LIB_PREFIX}${LIB_NAME}")
         set(WEBKIT_PRI_EXTRA_LIBS "${WEBKIT_PRI_EXTRA_LIBS} -l${LIB_PREFIX}${LIB_NAME}")
@@ -786,6 +797,7 @@ if (COMPILER_IS_GCC_OR_CLANG)
     set_source_files_properties(
         qt/Api/qwebdatabase.cpp
         qt/Api/qwebelement.cpp
+        qt/Api/qwebfullscreenrequest.cpp
         qt/Api/qwebhistory.cpp
         qt/Api/qwebhistoryinterface.cpp
         qt/Api/qwebpluginfactory.cpp
@@ -795,7 +807,6 @@ if (COMPILER_IS_GCC_OR_CLANG)
 
         qt/WidgetApi/qgraphicswebview.cpp
         qt/WidgetApi/qwebframe.cpp
-        qt/WidgetApi/qwebfullscreenrequest.cpp
         qt/WidgetApi/qwebinspector.cpp
         qt/WidgetApi/qwebpage.cpp
         qt/WidgetApi/qwebview.cpp
diff --git a/Source/WebKit/qt/WebCoreSupport/FrameLoaderClientQt.cpp b/Source/WebKit/qt/WebCoreSupport/FrameLoaderClientQt.cpp
index 50f91e203..7312792ce 100644
--- a/Source/WebKit/qt/WebCoreSupport/FrameLoaderClientQt.cpp
+++ b/Source/WebKit/qt/WebCoreSupport/FrameLoaderClientQt.cpp
@@ -1233,7 +1233,9 @@ void FrameLoaderClientQt::startDownload(const WebCore::ResourceRequest& request,
     if (!m_webFrame)
         return;
 
-    m_webFrame->pageAdapter->emitDownloadRequested(request.toNetworkRequest(m_frame->loader().networkingContext()));
+    QNetworkRequest r = request.toNetworkRequest(m_frame->loader().networkingContext());
+    if (r.url().isValid())
+        m_webFrame->pageAdapter->emitDownloadRequested(r);
 }
 
 RefPtr<Frame> FrameLoaderClientQt::createFrame(const URL& url, const String& name, HTMLFrameOwnerElement* ownerElement, const String& referrer, bool allowsScrolling, int marginWidth, int marginHeight)
diff --git a/Source/WebKit/qt/WebCoreSupport/InspectorServerQt.cpp b/Source/WebKit/qt/WebCoreSupport/InspectorServerQt.cpp
index 79dfb906f..72563a1f9 100644
--- a/Source/WebKit/qt/WebCoreSupport/InspectorServerQt.cpp
+++ b/Source/WebKit/qt/WebCoreSupport/InspectorServerQt.cpp
@@ -357,7 +357,7 @@ void InspectorServerRequestHandlerQt::webSocketReadyRead()
         
         if (m_inspectorClient) {
             InspectorController& inspectorController = m_inspectorClient->m_inspectedWebPage->page->inspectorController();
-            inspectorController.dispatchMessageFromFrontend(QString::fromUtf8(payload));
+            inspectorController.dispatchMessageFromFrontend(String::fromUTF8(payload.data(), payload.size()));
         }
     }
 }
diff --git a/Source/WebKit/qt/WebCoreSupport/QWebFrameAdapter.cpp b/Source/WebKit/qt/WebCoreSupport/QWebFrameAdapter.cpp
index e6145b6ff..df28e9f21 100644
--- a/Source/WebKit/qt/WebCoreSupport/QWebFrameAdapter.cpp
+++ b/Source/WebKit/qt/WebCoreSupport/QWebFrameAdapter.cpp
@@ -961,6 +961,8 @@ void QWebFrameAdapter::setViewportSize(const QSize& size)
     FrameView* view = frame->view();
     ASSERT(view);
     view->resize(size);
+    if (view->needsLayout())
+        view->layout();
     view->adjustViewSize();
 }
 
diff --git a/Source/WebKit/qt/WebCoreSupport/QWebPageAdapter.cpp b/Source/WebKit/qt/WebCoreSupport/QWebPageAdapter.cpp
index ab9fb1382..89e872fb2 100644
--- a/Source/WebKit/qt/WebCoreSupport/QWebPageAdapter.cpp
+++ b/Source/WebKit/qt/WebCoreSupport/QWebPageAdapter.cpp
@@ -434,6 +434,9 @@ bool QWebPageAdapter::findText(const QString& subString, FindFlag options)
     if (options & FindBeginsInSelection)
         webCoreFindOptions |= WebCore::StartInSelection;
 
+    if (options & FindAtWordEndingsOnly)
+        webCoreFindOptions |= WebCore::AtWordEnds;
+
     if (options & HighlightAllOccurrences) {
         if (subString.isEmpty()) {
             page->unmarkAllTextMatches();
diff --git a/Source/WebKit/qt/WebCoreSupport/QWebPageAdapter.h b/Source/WebKit/qt/WebCoreSupport/QWebPageAdapter.h
index 969ce8700..1b7199a9c 100644
--- a/Source/WebKit/qt/WebCoreSupport/QWebPageAdapter.h
+++ b/Source/WebKit/qt/WebCoreSupport/QWebPageAdapter.h
@@ -122,7 +122,8 @@ public:
         HighlightAllOccurrences = 8,
         FindAtWordBeginningsOnly = 16,
         TreatMedialCapitalAsWordBeginning = 32,
-        FindBeginsInSelection = 64
+        FindBeginsInSelection = 64,
+        FindAtWordEndingsOnly = 128
     };
 
     // valid values matching those from ScrollTypes.h
diff --git a/Source/WebKit/qt/WidgetApi/qwebpage.cpp b/Source/WebKit/qt/WidgetApi/qwebpage.cpp
index be8bd3edb..f8d8c0abc 100644
--- a/Source/WebKit/qt/WidgetApi/qwebpage.cpp
+++ b/Source/WebKit/qt/WidgetApi/qwebpage.cpp
@@ -3161,6 +3161,50 @@ bool QWebPage::extension(Extension extension, const ExtensionOption *option, Ext
     }
 #endif
 
+    if (extension == ErrorPageExtension) {
+        auto* errorOption = static_cast<const ErrorPageExtensionOption*>(option);
+
+        QString errorCode;
+        switch (errorOption->domain) {
+        case QWebPage::Http:
+            errorCode = tr("HTTP Error %0").arg(errorOption->error);
+            break;
+        case QWebPage::QtNetwork:
+            errorCode = tr("QtNetwork Error %0").arg(errorOption->error);
+            break;
+        case QWebPage::WebKit:
+            errorCode = tr("WebKit Error %0").arg(errorOption->error);
+            break;
+        }
+
+        QString pageHeader = errorOption->errorString;
+        if (pageHeader.isEmpty())
+            pageHeader = errorCode;
+        else if (pageHeader.endsWith(QLatin1Char('.')))
+            pageHeader.chop(1);
+
+        auto* pageOutput = static_cast<ErrorPageExtensionReturn*>(output);
+        pageOutput->baseUrl = errorOption->url;
+        QString escapedUrl = errorOption->url.toDisplayString().toHtmlEscaped();
+        pageOutput->content = QStringLiteral("<html><head>"
+            "<meta charset=\"utf-8\">"
+            "<title>%0</title>"
+            "<style>"
+            "html{font-family:sans;background:#EEE;color:#000;}"
+            "body{max-width:600px;margin:150px auto 0;padding:10px;}"
+            "pre{text-align:right;color:#999;}"
+            "</style>"
+            "</head><body>"
+            "<h1>%0</h1><hr>"
+            "<p>%1</p><pre>%2</pre>"
+            "</body></html>").arg(
+                pageHeader.toHtmlEscaped(),
+                tr("Failed to load URL %0.").toHtmlEscaped().arg(QLatin1String("<a href=\"") + escapedUrl + QLatin1String("\">") + escapedUrl + QLatin1String("</a>")),
+                errorCode.toHtmlEscaped()).toUtf8();
+
+        return true;
+    }
+
     return false;
 }
 
@@ -3172,11 +3216,10 @@ bool QWebPage::extension(Extension extension, const ExtensionOption *option, Ext
 bool QWebPage::supportsExtension(Extension extension) const
 {
 #ifndef QT_NO_FILEDIALOG
-    return extension == ChooseMultipleFilesExtension;
-#else
-    Q_UNUSED(extension);
-    return false;
+    if (extension == ChooseMultipleFilesExtension)
+        return true;
 #endif
+    return extension == ErrorPageExtension;
 }
 
 /*!
diff --git a/Source/WebKit/qt/WidgetApi/qwebpage.h b/Source/WebKit/qt/WidgetApi/qwebpage.h
index bff0852d7..c3e469102 100644
--- a/Source/WebKit/qt/WidgetApi/qwebpage.h
+++ b/Source/WebKit/qt/WidgetApi/qwebpage.h
@@ -207,7 +207,9 @@ public:
         HighlightAllOccurrences = 8,
         FindAtWordBeginningsOnly = 16,
         TreatMedialCapitalAsWordBeginning = 32,
-        FindBeginsInSelection = 64
+        FindBeginsInSelection = 64,
+        FindAtWordEndingsOnly = 128,
+        FindExactMatchOnly = (FindAtWordBeginningsOnly | FindAtWordEndingsOnly)
     };
     Q_DECLARE_FLAGS(FindFlags, FindFlag)
 
diff --git a/Source/WebKit2/PlatformQt.cmake b/Source/WebKit2/PlatformQt.cmake
index 5243ef2d8..6bd0627f0 100644
--- a/Source/WebKit2/PlatformQt.cmake
+++ b/Source/WebKit2/PlatformQt.cmake
@@ -17,6 +17,8 @@ if (${JavaScriptCore_LIBRARY_TYPE} MATCHES STATIC)
     add_definitions(-DSTATICALLY_LINKED_WITH_WTF -DSTATICALLY_LINKED_WITH_JavaScriptCore)
 endif ()
 
+QTWEBKIT_SKIP_AUTOMOC(WebKit2)
+
 #set(WebKit2_USE_PREFIX_HEADER ON)
 
 list(APPEND WebKit2_INCLUDE_DIRECTORIES
@@ -280,25 +282,27 @@ list(APPEND WebProcess_SOURCES
     qt/MainQt.cpp
 )
 
+if (NOT SHARED_CORE)
+    set(WebProcess_LIBRARIES
+        WebKit
+    )
+    set(NetworkProcess_LIBRARIES
+        WebKit
+    )
+    set(DatabaseProcess_LIBRARIES
+        WebKit
+    )
+    set(PluginProcess_LIBRARIES
+        WebKit
+    )
+endif ()
+
 # FIXME: Allow building without widgets
-set(WebProcess_LIBRARIES
-    WebKit
+list(APPEND WebProcess_LIBRARIES
     Qt5::Widgets
     WebKitWidgets
 )
 
-set(NetworkProcess_LIBRARIES
-    WebKit
-)
-
-set(DatabaseProcess_LIBRARIES
-    WebKit
-)
-
-set(PluginProcess_LIBRARIES
-    WebKit
-)
-
 list(APPEND NetworkProcess_SOURCES
     NetworkProcess/EntryPoint/qt/NetworkProcessMain.cpp
 )
diff --git a/Source/WebKit2/UIProcess/API/qt/qwebchannelwebkittransport.cpp b/Source/WebKit2/UIProcess/API/qt/qwebchannelwebkittransport.cpp
index c6f96f094..14c4db5a3 100644
--- a/Source/WebKit2/UIProcess/API/qt/qwebchannelwebkittransport.cpp
+++ b/Source/WebKit2/UIProcess/API/qt/qwebchannelwebkittransport.cpp
@@ -40,10 +40,11 @@
 ****************************************************************************/
 
 #include "config.h"
-#include "qwebchannelwebkittransport_p.h"
 
 #if ENABLE(QT_WEBCHANNEL)
 
+#include "qwebchannelwebkittransport_p.h"
+
 #include "qquickwebview_p.h"
 
 #include <QJsonDocument>
diff --git a/Source/WebKit2/UIProcess/API/qt/tests/CMakeLists.txt b/Source/WebKit2/UIProcess/API/qt/tests/CMakeLists.txt
index 899a9e038..210342ef5 100644
--- a/Source/WebKit2/UIProcess/API/qt/tests/CMakeLists.txt
+++ b/Source/WebKit2/UIProcess/API/qt/tests/CMakeLists.txt
@@ -84,6 +84,12 @@ set(qmltests_LIBRARIES
     ${Qt5Test_LIBRARIES}
 )
 
+if (SHARED_CORE)
+    list(APPEND qmltests_LIBRARIES
+        WebKit2
+    )
+endif ()
+
 add_executable(tst_qmltests_WebView ${qmltests_SOURCES})
 target_compile_definitions(tst_qmltests_WebView PRIVATE ${tst_qmltests_WebView_DEFINITIONS})
 target_link_libraries(tst_qmltests_WebView ${qmltests_LIBRARIES})
diff --git a/Source/cmake/OptionsCommon.cmake b/Source/cmake/OptionsCommon.cmake
index 529e2bc0d..9c4f00ecd 100644
--- a/Source/cmake/OptionsCommon.cmake
+++ b/Source/cmake/OptionsCommon.cmake
@@ -32,10 +32,6 @@ if (COMPILER_IS_GCC_OR_CLANG)
     set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fno-exceptions -fno-strict-aliasing")
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fno-exceptions -fno-strict-aliasing -fno-rtti")
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
-    if (NOT (COMPILER_IS_CLANG AND "${CLANG_VERSION}" VERSION_LESS 4.0.0))
-        set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wno-expansion-to-defined")
-        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-expansion-to-defined")
-    endif ()
 endif ()
 
 if (COMPILER_IS_CLANG AND CMAKE_GENERATOR STREQUAL "Ninja")
diff --git a/Source/cmake/OptionsQt.cmake b/Source/cmake/OptionsQt.cmake
index 457fff566..3fe374647 100644
--- a/Source/cmake/OptionsQt.cmake
+++ b/Source/cmake/OptionsQt.cmake
@@ -60,7 +60,16 @@ macro(QT_ADD_EXTRA_WEBKIT_TARGET_EXPORT target)
     endif ()
 endmacro()
 
-macro(QTWEBKIT_GENERATE_MOC_FILES_CPP)
+macro(QTWEBKIT_SKIP_AUTOMOC _target)
+    foreach (_src ${${_target}_SOURCES})
+        set_property(SOURCE ${_src} PROPERTY SKIP_AUTOMOC ON)
+    endforeach ()
+endmacro()
+
+macro(QTWEBKIT_GENERATE_MOC_FILES_CPP _target)
+    if (${ARGC} LESS 2)
+        message(FATAL_ERROR "QTWEBKIT_GENERATE_MOC_FILES_CPP must be called with at least 2 arguments")
+    endif ()
     foreach (_file ${ARGN})
         get_filename_component(_ext ${_file} EXT)
         if (NOT _ext STREQUAL ".cpp")
@@ -68,12 +77,12 @@ macro(QTWEBKIT_GENERATE_MOC_FILES_CPP)
         endif ()
         get_filename_component(_name_we ${_file} NAME_WE)
         set(_moc_name "${CMAKE_CURRENT_BINARY_DIR}/${_name_we}.moc")
-        qt5_generate_moc(${_file} ${_moc_name})
+        qt5_generate_moc(${_file} ${_moc_name} TARGET ${_target})
         ADD_SOURCE_DEPENDENCIES(${_file} ${_moc_name})
     endforeach ()
 endmacro()
 
-macro(QTWEBKIT_GENERATE_MOC_FILE_H _header _source)
+macro(QTWEBKIT_GENERATE_MOC_FILE_H _target _header _source)
     get_filename_component(_header_ext ${_header} EXT)
     get_filename_component(_source_ext ${_source} EXT)
     if ((NOT _header_ext STREQUAL ".h") OR (NOT _source_ext STREQUAL ".cpp"))
@@ -81,16 +90,19 @@ macro(QTWEBKIT_GENERATE_MOC_FILE_H _header _source)
     endif ()
     get_filename_component(_name_we ${_header} NAME_WE)
     set(_moc_name "${CMAKE_CURRENT_BINARY_DIR}/moc_${_name_we}.cpp")
-    qt5_generate_moc(${_header} ${_moc_name})
+    qt5_generate_moc(${_header} ${_moc_name} TARGET ${_target})
     ADD_SOURCE_DEPENDENCIES(${_source} ${_moc_name})
 endmacro()
 
-macro(QTWEBKIT_GENERATE_MOC_FILES_H)
+macro(QTWEBKIT_GENERATE_MOC_FILES_H _target)
+    if (${ARGC} LESS 2)
+        message(FATAL_ERROR "QTWEBKIT_GENERATE_MOC_FILES_H must be called with at least 2 arguments")
+    endif ()
     foreach (_header ${ARGN})
         get_filename_component(_header_dir ${_header} DIRECTORY)
         get_filename_component(_name_we ${_header} NAME_WE)
         set(_source "${_header_dir}/${_name_we}.cpp")
-        QTWEBKIT_GENERATE_MOC_FILE_H(${_header} ${_source})
+        QTWEBKIT_GENERATE_MOC_FILE_H(${_target} ${_header} ${_source})
     endforeach ()
 endmacro()
 
@@ -558,6 +570,14 @@ if (COMPILER_IS_GCC_OR_CLANG AND UNIX)
     endif ()
 endif ()
 
+# Improvised backport of r222112 - not needed with current WebKit
+# -Wexpansion-to-defined produces false positives with GCC but not Clang
+# https://bugs.webkit.org/show_bug.cgi?id=167643#c13
+if (CMAKE_COMPILER_IS_GNUCXX AND (NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS "7.0.0"))
+    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wno-expansion-to-defined")
+    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-expansion-to-defined")
+endif ()
+
 if (WIN32 AND COMPILER_IS_GCC_OR_CLANG)
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fno-keep-inline-dllexport")
 endif ()
@@ -611,13 +631,8 @@ if (ENABLE_OPENGL)
     SET_AND_EXPOSE_TO_BUILD(ENABLE_GRAPHICS_CONTEXT_3D TRUE)
 
     # TODO: Add proper support of DynamicGL detection to Qt and use it
-    if (WIN32)
-        if  (QT_USES_GLES2_ONLY)
-            # FIXME: Fix build with ANGLE-only Qt
-            message(FATAL_ERROR "Only dynamic GL is supported on Windows at the moment")
-        else ()
-            set(Qt5Gui_OPENGL_IMPLEMENTATION GL)
-        endif ()
+    if (WIN32 AND NOT QT_USES_GLES2_ONLY)
+        set(Qt5Gui_OPENGL_IMPLEMENTATION GL)
     endif ()
 endif ()
 
diff --git a/Source/cmake/WebKitMacros.cmake b/Source/cmake/WebKitMacros.cmake
index 858e2e47d..07e31432a 100644
--- a/Source/cmake/WebKitMacros.cmake
+++ b/Source/cmake/WebKitMacros.cmake
@@ -377,22 +377,12 @@ macro(GENERATE_WEBKIT2_MESSAGE_SOURCES _output_source _input_files)
     endforeach ()
 endmacro()
 
-macro(MAKE_JS_FILE_ARRAYS _output_cpp _output_h _scripts _scripts_dependencies)
-    if (NOT CMAKE_VERSION VERSION_LESS 3.1)
-        set(_python_path ${CMAKE_COMMAND} -E env "PYTHONPATH=${JavaScriptCore_SCRIPTS_DIR}")
-    elseif (WIN32)
-        set(_python_path set "PYTHONPATH=${JavaScriptCore_SCRIPTS_DIR}" &&)
-    else ()
-        set(_python_path "PYTHONPATH=${JavaScriptCore_SCRIPTS_DIR}")
-    endif ()
-
+macro(MAKE_JS_FILE_ARRAYS _output_cpp _output_h _namespace _scripts _scripts_dependencies)
     add_custom_command(
         OUTPUT ${_output_h} ${_output_cpp}
-        MAIN_DEPENDENCY ${WEBCORE_DIR}/Scripts/make-js-file-arrays.py
-        DEPENDS ${${_scripts}}
-        COMMAND ${_python_path} ${PYTHON_EXECUTABLE} ${WEBCORE_DIR}/Scripts/make-js-file-arrays.py ${_output_h} ${_output_cpp} ${${_scripts}}
+        DEPENDS ${JavaScriptCore_SCRIPTS_DIR}/make-js-file-arrays.py ${${_scripts}}
+        COMMAND ${PYTHON_EXECUTABLE} ${JavaScriptCore_SCRIPTS_DIR}/make-js-file-arrays.py -n ${_namespace} ${_output_h} ${_output_cpp} ${${_scripts}}
         VERBATIM)
-    list(APPEND WebCore_DERIVED_SOURCES ${_output_cpp})
     ADD_SOURCE_DEPENDENCIES(${${_scripts_dependencies}} ${_output_h} ${_output_cpp})
 endmacro()
 
diff --git a/Tools/DumpRenderTree/CMakeLists.txt b/Tools/DumpRenderTree/CMakeLists.txt
index db6ef4304..4a726ccaf 100644
--- a/Tools/DumpRenderTree/CMakeLists.txt
+++ b/Tools/DumpRenderTree/CMakeLists.txt
@@ -1,3 +1,5 @@
+QTWEBKIT_SKIP_AUTOMOC(DumpRenderTree)
+
 set(DumpRenderTree_SOURCES
     AccessibilityController.cpp
     AccessibilityTextMarker.cpp
@@ -130,4 +132,7 @@ endif ()
 
 if (${PORT} STREQUAL "Qt")
     set_target_properties(DumpRenderTree PROPERTIES AUTOMOC ON)
+    if (ENABLE_NETSCAPE_PLUGIN_API)
+        target_compile_definitions(TestNetscapePlugin PRIVATE QT_NO_VERSION_TAGGING)
+    endif ()
 endif ()
diff --git a/Tools/MiniBrowser/qt/CMakeLists.txt b/Tools/MiniBrowser/qt/CMakeLists.txt
index e77d3bd54..68dd13c8b 100644
--- a/Tools/MiniBrowser/qt/CMakeLists.txt
+++ b/Tools/MiniBrowser/qt/CMakeLists.txt
@@ -53,6 +53,12 @@ set(MiniBrowser_LIBRARIES
     ${Qt5Quick_LIBRARIES}
 )
 
+if (SHARED_CORE)
+    list(APPEND MiniBrowser_LIBRARIES
+        WebKit2
+    )
+endif ()
+
 if (ENABLE_TEST_SUPPORT)
     add_definitions(-DHAVE_QTTESTSUPPORT)
 endif ()
diff --git a/Tools/QtTestBrowser/launcherwindow.cpp b/Tools/QtTestBrowser/launcherwindow.cpp
index 0fd64654e..59851883e 100644
--- a/Tools/QtTestBrowser/launcherwindow.cpp
+++ b/Tools/QtTestBrowser/launcherwindow.cpp
@@ -345,6 +345,9 @@ void LauncherWindow::createChrome()
     spatialNavigationAction->setCheckable(true);
     spatialNavigationAction->setShortcut(QKeySequence(Qt::CTRL | Qt::SHIFT | Qt::Key_S));
 
+    QAction* caretBrowsingAction = toolsMenu->addAction("Toggle Caret Browsing", this, SLOT(toggleCaretBrowsing(bool)));
+    caretBrowsingAction->setCheckable(true);
+
     QAction* toggleFrameFlattening = toolsMenu->addAction("Toggle Frame Flattening", this, SLOT(toggleFrameFlattening(bool)));
     toggleFrameFlattening->setCheckable(true);
     toggleFrameFlattening->setChecked(settings->testAttribute(QWebSettings::FrameFlatteningEnabled));
@@ -972,6 +975,11 @@ void LauncherWindow::toggleSpatialNavigation(bool enable)
     page()->settings()->setAttribute(QWebSettings::SpatialNavigationEnabled, enable);
 }
 
+void LauncherWindow::toggleCaretBrowsing(bool enable)
+{
+    page()->settings()->setAttribute(QWebSettings::CaretBrowsingEnabled, enable);
+}
+
 void LauncherWindow::toggleFullScreenMode(bool enable)
 {
     bool alreadyEnabled = windowState() & Qt::WindowFullScreen;
@@ -1164,9 +1172,13 @@ void LauncherWindow::downloadRequest(const QNetworkRequest &request)
 
 void LauncherWindow::fileDownloadFinished()
 {
-    QFileInfo fileInf(m_reply->request().url().toString());
-    QString requestFileName = QDir::homePath() + "/" + fileInf.fileName();
-    QString fileName = QFileDialog::getSaveFileName(this, "Save as...", requestFileName, "All Files (*)");
+    QString suggestedFileName;
+    if (m_reply->request().url().scheme().toLower() != QLatin1String("data")) {
+        QFileInfo fileInf(m_reply->request().url().toString());
+        suggestedFileName = QDir::homePath() + "/" + fileInf.fileName();
+    } else
+        suggestedFileName = QStringLiteral("data");
+    QString fileName = QFileDialog::getSaveFileName(this, "Save as...", suggestedFileName, "All Files (*)");
 
     if (fileName.isEmpty())
         return;
diff --git a/Tools/QtTestBrowser/launcherwindow.h b/Tools/QtTestBrowser/launcherwindow.h
index a05a6cd56..e475a8022 100644
--- a/Tools/QtTestBrowser/launcherwindow.h
+++ b/Tools/QtTestBrowser/launcherwindow.h
@@ -137,6 +137,7 @@ protected Q_SLOTS:
     void toggleWebAudio(bool toggle);
     void toggleMediaSource(bool toggle);
     void toggleSpatialNavigation(bool enable);
+    void toggleCaretBrowsing(bool enable);
     void toggleFullScreenMode(bool enable);
     void toggleFrameFlattening(bool toggle);
     void toggleJavaScriptEnabled(bool enable);
diff --git a/Tools/qmake/mkspecs/features/functions.prf b/Tools/qmake/mkspecs/features/functions.prf
index 3e0d40610..3699d6b71 100644
--- a/Tools/qmake/mkspecs/features/functions.prf
+++ b/Tools/qmake/mkspecs/features/functions.prf
@@ -66,9 +66,6 @@ defineTest(isPlatformSupported) {
     }
 
     win32 {
-        qtConfig(opengles2):!qtConfig(dynamicgl) {
-            skipBuild("QtWebKit supports only dynamic GL Qt builds on Windows at the moment.")
-        }
         winrt {
             skipBuild("WinRT is not supported.")
         }