scheduler: Implement WebFrameScheduler and WebPageScheduler

third_party/WebKit/Source/core/frame/FrameHost.h

 /*
  * Copyright (C) 2013 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 33 matching lines @@
 namespace blink {
 
 class ChromeClient;
 class ConsoleMessageStorage;
 class EventHandlerRegistry;
 class Page;
 class PageScaleConstraintsSet;
 class Settings;
 class UseCounter;
 class Visitor;
+class WebFrameHostScheduler;
 
 // FrameHost is the set of global data shared between multiple frames
 // and is provided by the embedder to each frame when created.
 // FrameHost currently corresponds to the Page object in core/page
 // however the concept of a Page is moving up out of Blink.
 // In an out-of-process iframe world, a single Page may have
 // multiple frames in different process, thus Page becomes a
 // browser-level concept and Blink core/ only knows about its LocalFrame (and FrameHost).
 // Separating Page from the rest of core/ through this indirection
 // allows us to slowly refactor Page without breaking the rest of core.
@@ skipping 31 matching lines @@
     // recursive frameset pages can quickly bring the program to its knees
     // with exponential growth in the number of frames.
     static const int maxNumberOfFrames = 1000;
     void incrementSubframeCount() { ++m_subframeCount; }
     void decrementSubframeCount() { ASSERT(m_subframeCount); --m_subframeCount; }
     int subframeCount() const;
 
     void setDefaultPageScaleLimits(float minScale, float maxScale);
     void setUserAgentPageScaleConstraints(PageScaleConstraints newConstraints);
 
+    WebFrameHostScheduler* frameHostScheduler() const { return m_frameHostScheduler.get(); }
+
+
 private:
     explicit FrameHost(Page&);
 
     RawPtrWillBeMember<Page> m_page;
     const OwnPtrWillBeMember<TopControls> m_topControls;
     const OwnPtr<PageScaleConstraintsSet> m_pageScaleConstraintsSet;
     const OwnPtrWillBeMember<VisualViewport> m_visualViewport;
     const OwnPtrWillBeMember<EventHandlerRegistry> m_eventHandlerRegistry;
     const OwnPtrWillBeMember<ConsoleMessageStorage> m_consoleMessageStorage;
+    const OwnPtrWillBeMember<WebFrameHostScheduler> m_frameHostScheduler;
 
     AtomicString m_overrideEncoding;
     int m_subframeCount;
 };
 
 }
 
 #endif // FrameHost_h