[Slimming Paint] Paint the inspector overlay with GraphicsLayer DisplayList.

Source/web/WebDevToolsAgentImpl.h

 /*
  * Copyright (C) 2010 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 29 matching lines @@
 #include "public/web/WebPageOverlay.h"
 #include "wtf/Forward.h"
 #include "wtf/OwnPtr.h"
 #include "wtf/Vector.h"
 
 namespace blink {
 
 class LocalFrame;
 class InspectorClient;
 class InspectorController;
+class IntPoint;

[Xianzhu, 2015/02/10 23:34:01]

Nit: Is this used?

[jbroman, 2015/02/11 00:32:54]

Yes. m_lastPinchAnchorDip requires this forward declaration, and changes to
include files elsewhere caused this declaration to be missing.

 class Page;
 class PlatformKeyboardEvent;
 class WebDevToolsAgentClient;
 class WebInputEvent;
 class WebLocalFrameImpl;
 class WebString;
 class WebViewImpl;
 
 class WebDevToolsAgentImpl final
     : public WebDevToolsAgent
@@ skipping 39 matching lines @@
 
     virtual void setTraceEventCallback(const WTF::String& categoryFilter, TraceEventCallback) override;
     virtual void resetTraceEventCallback() override;
     virtual void enableTracing(const WTF::String& categoryFilter) override;
     virtual void disableTracing() override;
 
     virtual void dispatchKeyEvent(const PlatformKeyboardEvent&) override;
     virtual void dispatchMouseEvent(const PlatformMouseEvent&) override;
 
     // WebPageOverlay
-    virtual void paintPageOverlay(WebCanvas*) override;
+    virtual void paintPageOverlay(WebGraphicsContext*, const WebSize& webViewSize) override;
 
     void flushPendingProtocolNotifications();
 
 private:
     // WebThread::TaskObserver
     virtual void willProcessTask() override;
     virtual void didProcessTask() override;
 
     void enableMobileEmulation();
     void disableMobileEmulation();
@@ skipping 20 matching lines @@
     OwnPtr<IntPoint> m_lastPinchAnchorDip;
 
     typedef Vector<RefPtr<JSONObject> > NotificationQueue;
     NotificationQueue m_notificationQueue;
     String m_stateCookie;
 };
 
 } // namespace blink
 
 #endif