Use web_cache component

Use the web_cache component which monitors and adjusts the web cache,
so that the memory use is limited across multiple renderer processes.

Change-Id: I9faa060d48f99a3c527fe0e0963bbe86db4b502c
Reviewed-by: Joerg Bornemann <joerg.bornemann@theqtcompany.com>
Reviewed-by: Michael Brüning <michael.bruning@theqtcompany.com>

4 files changed, 29 insertions, 3 deletions

diff --git a/src/core/renderer/content_renderer_client_qt.cpp b/src/core/renderer/content_renderer_client_qt.cpp
index 72ca29be9..e281cbc95 100644
--- a/src/core/renderer/content_renderer_client_qt.cpp
+++ b/src/core/renderer/content_renderer_client_qt.cpp
@@ -40,6 +40,7 @@
 #include "chrome/common/localized_error.h"
 #include "components/error_page/common/error_page_params.h"
 #include "components/visitedlink/renderer/visitedlink_slave.h"
+#include "components/web_cache/renderer/web_cache_render_process_observer.h"
 #include "content/public/renderer/render_frame.h"
 #include "content/public/renderer/render_thread.h"
 #include "content/public/renderer/render_view.h"
@@ -77,7 +78,9 @@ void ContentRendererClientQt::RenderThreadStarted()
     content::RenderThread *renderThread = content::RenderThread::Get();
     renderThread->RegisterExtension(WebChannelIPCTransport::getV8Extension());
     m_visitedLinkSlave.reset(new visitedlink::VisitedLinkSlave);
+    m_webCacheObserver.reset(new web_cache::WebCacheRenderProcessObserver());
     renderThread->AddObserver(m_visitedLinkSlave.data());
+    renderThread->AddObserver(m_webCacheObserver.data());
     renderThread->AddObserver(UserScriptController::instance());
 
     // mark qrc as a secure scheme (avoids deprecation warnings)
@@ -87,7 +90,7 @@ void ContentRendererClientQt::RenderThreadStarted()
 void ContentRendererClientQt::RenderViewCreated(content::RenderView* render_view)
 {
     // RenderViewObservers destroy themselves with their RenderView.
-    new QtRenderViewObserver(render_view);
+    new QtRenderViewObserver(render_view, m_webCacheObserver.data());
     new WebChannelIPCTransport(render_view);
     UserScriptController::instance()->renderViewCreated(render_view);
 }
diff --git a/src/core/renderer/content_renderer_client_qt.h b/src/core/renderer/content_renderer_client_qt.h
index fab88441f..eb55156ad 100644
--- a/src/core/renderer/content_renderer_client_qt.h
+++ b/src/core/renderer/content_renderer_client_qt.h
@@ -45,6 +45,10 @@ namespace visitedlink {
 class VisitedLinkSlave;
 }
 
+namespace web_cache {
+class WebCacheRenderProcessObserver;
+}
+
 namespace QtWebEngineCore {
 
 class ContentRendererClientQt : public content::ContentRendererClient {
@@ -64,6 +68,7 @@ public:
 
 private:
     QScopedPointer<visitedlink::VisitedLinkSlave> m_visitedLinkSlave;
+    QScopedPointer<web_cache::WebCacheRenderProcessObserver> m_webCacheObserver;
 };
 
 } // namespace
diff --git a/src/core/renderer/qt_render_view_observer.cpp b/src/core/renderer/qt_render_view_observer.cpp
index ba91e54ae..086b07d17 100644
--- a/src/core/renderer/qt_render_view_observer.cpp
+++ b/src/core/renderer/qt_render_view_observer.cpp
@@ -38,14 +38,18 @@
 
 #include "common/qt_messages.h"
 
+#include "components/web_cache/renderer/web_cache_render_process_observer.h"
 #include "content/public/renderer/render_view.h"
 #include "third_party/WebKit/public/web/WebDocument.h"
 #include "third_party/WebKit/public/web/WebElement.h"
 #include "third_party/WebKit/public/web/WebFrame.h"
 #include "third_party/WebKit/public/web/WebView.h"
 
-QtRenderViewObserver::QtRenderViewObserver(content::RenderView* render_view)
+QtRenderViewObserver::QtRenderViewObserver(
+        content::RenderView* render_view,
+        web_cache::WebCacheRenderProcessObserver* web_cache_render_process_observer)
     : content::RenderViewObserver(render_view)
+    , m_web_cache_render_process_observer(web_cache_render_process_observer)
 {
 }
 
@@ -86,3 +90,9 @@ bool QtRenderViewObserver::OnMessageReceived(const IPC::Message& message)
     IPC_END_MESSAGE_MAP()
     return handled;
 }
+
+void QtRenderViewObserver::Navigate(const GURL &)
+{
+    if (m_web_cache_render_process_observer)
+        m_web_cache_render_process_observer->ExecutePendingClearCache();
+}
diff --git a/src/core/renderer/qt_render_view_observer.h b/src/core/renderer/qt_render_view_observer.h
index 3f7829a92..1ead53141 100644
--- a/src/core/renderer/qt_render_view_observer.h
+++ b/src/core/renderer/qt_render_view_observer.h
@@ -40,9 +40,14 @@
 
 #include <QtGlobal>
 
+namespace web_cache {
+class WebCacheRenderProcessObserver;
+}
+
 class QtRenderViewObserver : public content::RenderViewObserver {
 public:
-    QtRenderViewObserver(content::RenderView* render_view);
+    QtRenderViewObserver(content::RenderView* render_view,
+                         web_cache::WebCacheRenderProcessObserver* web_cache_render_process_observer);
 
 private:
     void onFetchDocumentMarkup(quint64 requestId);
@@ -52,6 +57,9 @@ private:
     void OnFirstVisuallyNonEmptyLayout() Q_DECL_OVERRIDE;
 
     virtual bool OnMessageReceived(const IPC::Message& message) Q_DECL_OVERRIDE;
+    virtual void Navigate(const GURL& url) Q_DECL_OVERRIDE;
+
+    web_cache::WebCacheRenderProcessObserver* m_web_cache_render_process_observer;
 
     DISALLOW_COPY_AND_ASSIGN(QtRenderViewObserver);
 };