Add latency measurement system

content/renderer/gpu/compositor_output_surface.h

Index: content/renderer/gpu/compositor_output_surface.h
diff --git a/content/renderer/gpu/compositor_output_surface.h b/content/renderer/gpu/compositor_output_surface.h
index b14c4a0701226049e306ba1a87febd4e1ee2146a..50fd83a4445057bfabc953647ec78e821e58ef00 100644
--- a/content/renderer/gpu/compositor_output_surface.h
+++ b/content/renderer/gpu/compositor_output_surface.h
@@ -25,6 +25,8 @@ class Message;
 
 namespace content {
 
+class CommandBufferProxyImpl;
+
 // This class can be created only on the main thread, but then becomes pinned
 // to a fixed thread when bindToClient is called.
 class CompositorOutputSurface
@@ -36,6 +38,7 @@ class CompositorOutputSurface
 
   CompositorOutputSurface(int32 routing_id,
                           WebKit::WebGraphicsContext3D* context3d,
+                          CommandBufferProxyImpl* command_buffer_proxy,
                           cc::SoftwareOutputDevice* software);
   virtual ~CompositorOutputSurface();
 
@@ -46,6 +49,7 @@ class CompositorOutputSurface
   virtual cc::SoftwareOutputDevice* SoftwareDevice() const OVERRIDE;
   virtual void SendFrameToParentCompositor(
       const cc::CompositorFrame&) OVERRIDE;
+  virtual void SetLatencyInfo(const cc::LatencyInfo&) OVERRIDE;
 
  private:
   class CompositorOutputSurfaceProxy :
@@ -71,6 +75,7 @@ class CompositorOutputSurface
   void OnMessageReceived(const IPC::Message& message);
   void OnUpdateVSyncParameters(
       base::TimeTicks timebase, base::TimeDelta interval);
+  void OnReceivedLatencyInfo(const cc::LatencyInfo&);
   bool Send(IPC::Message* message);
 
   scoped_refptr<IPC::ForwardingMessageFilter> output_surface_filter_;
@@ -80,6 +85,7 @@ class CompositorOutputSurface
   struct Capabilities capabilities_;
   scoped_ptr<WebKit::WebGraphicsContext3D> context3D_;
   scoped_ptr<cc::SoftwareOutputDevice> software_device_;
+  CommandBufferProxyImpl* command_buffer_proxy_;
 };
 
 }  // namespace content