1 files changed, 79 insertions, 0 deletions
diff --git a/chromium/third_party/WebKit/Source/modules/performance/SharedWorkerPerformance.cpp b/chromium/third_party/WebKit/Source/modules/performance/SharedWorkerPerformance.cpp
new file mode 100644
index 00000000000..4e7de44b177
--- /dev/null
+++ b/chromium/third_party/WebKit/Source/modules/performance/SharedWorkerPerformance.cpp
@@ -0,0 +1,79 @@
+/*
+ * Copyright (c) 2014, Opera Software ASA. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of Opera Software ASA nor the names of its
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "modules/performance/SharedWorkerPerformance.h"
+
+#include "core/dom/Document.h"
+#include "core/dom/ExecutionContext.h"
+#include "core/loader/DocumentLoadTiming.h"
+#include "core/loader/DocumentLoader.h"
+#include "core/workers/SharedWorker.h"
+
+namespace WebCore {
+
+SharedWorkerPerformance::SharedWorkerPerformance()
+    : m_timeOrigin(monotonicallyIncreasingTime())
+{
+}
+
+const char* SharedWorkerPerformance::supplementName()
+{
+    return "SharedWorkerPerformance";
+}
+
+SharedWorkerPerformance& SharedWorkerPerformance::from(SharedWorker& sharedWorker)
+{
+    SharedWorkerPerformance* supplement = static_cast<SharedWorkerPerformance*>(WillBeHeapSupplement<SharedWorker>::from(sharedWorker, supplementName()));
+    if (!supplement) {
+        supplement = new SharedWorkerPerformance();
+        provideTo(sharedWorker, supplementName(), adoptPtrWillBeNoop(supplement));
+    }
+    return *supplement;
+}
+
+double SharedWorkerPerformance::workerStart(ExecutionContext* context, SharedWorker& sharedWorker)
+{
+    return SharedWorkerPerformance::from(sharedWorker).getWorkerStart(context, sharedWorker);
+}
+
+double SharedWorkerPerformance::getWorkerStart(ExecutionContext* context, SharedWorker&) const
+{
+    ASSERT(context);
+    ASSERT(context->isDocument());
+    Document* document = toDocument(context);
+    if (!document->loader())
+        return 0;
+
+    double navigationStart = document->loader()->timing()->navigationStart();
+    return m_timeOrigin - navigationStart;
+}
+
+} // namespace WebCore
+