Decouple performance() from LocalDOMWindow

Source/web/WebLocalFrameImpl.cpp

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 129 matching lines @@
 #include "core/loader/SubstituteData.h"
 #include "core/page/Chrome.h"
 #include "core/page/EventHandler.h"
 #include "core/page/FocusController.h"
 #include "core/page/FrameTree.h"
 #include "core/page/Page.h"
 #include "core/page/PrintContext.h"
 #include "core/rendering/RenderBox.h"
 #include "core/rendering/RenderFrame.h"
 #include "core/rendering/RenderView.h"
+#include "core/timing/DOMWindowPerformance.h"
 #include "core/timing/Performance.h"
 #include "modules/geolocation/GeolocationController.h"
 #include "modules/notifications/NotificationPermissionClient.h"
 #include "modules/presentation/PresentationController.h"
 #include "modules/push_messaging/PushController.h"
 #include "modules/screen_orientation/ScreenOrientationController.h"
 #include "platform/ScriptForbiddenScope.h"
 #include "platform/TraceEvent.h"
 #include "platform/UserGestureIndicator.h"
 #include "platform/clipboard/ClipboardUtilities.h"
@@ skipping 519 matching lines @@
 {
     if (!frame() || !frame()->document())
         return WebDocument();
     return WebDocument(frame()->document());
 }
 
 WebPerformance WebLocalFrameImpl::performance() const
 {
     if (!frame())
         return WebPerformance();
-    return WebPerformance(frame()->domWindow()->performance());
+    return WebPerformance(DOMWindowPerformance::performance(*(frame()->domWindow())));
 }
 
 bool WebLocalFrameImpl::dispatchBeforeUnloadEvent()
 {
     if (!frame())
         return true;
     return frame()->loader().shouldClose();
 }
 
 void WebLocalFrameImpl::dispatchUnloadEvent()
@@ skipping 1302 matching lines @@
 {
     m_frameWidget = frameWidget;
 }
 
 WebFrameWidgetImpl* WebLocalFrameImpl::frameWidget() const
 {
     return m_frameWidget;
 }
 
 } // namespace blink