Send vsync timebase updates to the browser compositor

cc/layer_tree_host_impl.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 CCLayerTreeHostImpl_h
 #define CCLayerTreeHostImpl_h
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/time.h"
@@ skipping 132 matching lines @@
     virtual bool prepareToDraw(FrameData&);
     virtual void drawLayers(const FrameData&);
     // Must be called if and only if prepareToDraw was called.
     void didDrawAllLayers(const FrameData&);
 
     // CCRendererClient implementation
     virtual const IntSize& deviceViewportSize() const OVERRIDE;
     virtual const CCLayerTreeSettings& settings() const OVERRIDE;
     virtual void didLoseContext() OVERRIDE;
     virtual void onSwapBuffersComplete() OVERRIDE;
+    virtual void onUpdateVSyncTime(int64 time) OVERRIDE;
     virtual void setFullRootLayerDamage() OVERRIDE;
     virtual void releaseContentsTextures() OVERRIDE;
     virtual void setMemoryAllocationLimitBytes(size_t) OVERRIDE;
 
     // WebCompositorOutputSurfaceClient implementation.
     virtual void onVSyncParametersChanged(double monotonicTimebase, double intervalInSeconds) OVERRIDE;
 
     // Implementation
     bool canDraw();
     CCGraphicsContext* context() const;
@@ skipping 185 matching lines @@
 
     size_t m_numImplThreadScrolls;
     size_t m_numMainThreadScrolls;
 
     DISALLOW_COPY_AND_ASSIGN(CCLayerTreeHostImpl);
 };
 
 }  // namespace cc
 
 #endif