Add CCDelegatingRenderer, and corresponding IPCs

cc/CCSingleThreadProxy.h

 // Copyright 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CCSingleThreadProxy_h
 #define CCSingleThreadProxy_h
 
 #include "CCAnimationEvents.h"
 #include "CCLayerTreeHostImpl.h"
 #include "CCProxy.h"
@@ skipping 28 matching lines @@
     virtual bool commitRequested() const OVERRIDE;
     virtual void didAddAnimation() OVERRIDE;
     virtual void start() OVERRIDE;
     virtual void stop() OVERRIDE;
     virtual size_t maxPartialTextureUpdates() const OVERRIDE { return std::numeric_limits<size_t>::max(); }
     virtual void acquireLayerTextures() OVERRIDE { }
     virtual void forceSerializeOnSwapBuffers() OVERRIDE;
 
     // CCLayerTreeHostImplClient implementation
     virtual void didLoseContextOnImplThread() OVERRIDE { }
-    virtual void onSwapBuffersCompleteOnImplThread() OVERRIDE { ASSERT_NOT_REACHED(); }
+    virtual void onSwapBuffersCompleteOnImplThread() OVERRIDE { }
     virtual void onVSyncParametersChanged(double monotonicTimebase, double intervalInSeconds) OVERRIDE { }
     virtual void onCanDrawStateChanged(bool canDraw) OVERRIDE { }
     virtual void setNeedsRedrawOnImplThread() OVERRIDE { m_layerTreeHost->scheduleComposite(); }
     virtual void setNeedsCommitOnImplThread() OVERRIDE { m_layerTreeHost->scheduleComposite(); }
     virtual void postAnimationEventsToMainThreadOnImplThread(PassOwnPtr<CCAnimationEventsVector>, double wallClockTime) OVERRIDE;
 
     // Called by the legacy path where RenderWidget does the scheduling.
     void compositeImmediately();
 
 private:
@@ skipping 61 matching lines @@
 // satisfy assertion checks
 class DebugScopedSetImplThreadAndMainThreadBlocked {
 private:
     DebugScopedSetImplThread m_implThread;
     DebugScopedSetMainThreadBlocked m_mainThreadBlocked;
 };
 
 } // namespace WebCore
 
 #endif