Changed GpuVSyncProvider to implement gfx::VSyncProvider

gpu/ipc/service/image_transport_surface_delegate.h

Index: gpu/ipc/service/image_transport_surface_delegate.h
diff --git a/gpu/ipc/service/image_transport_surface_delegate.h b/gpu/ipc/service/image_transport_surface_delegate.h
index 87c6cd0b502809412de34df1e3c4ffe1dec6c972..8e421b41abee4992ed9430ef969c4254ae0c2d63 100644
--- a/gpu/ipc/service/image_transport_surface_delegate.h
+++ b/gpu/ipc/service/image_transport_surface_delegate.h
@@ -17,6 +17,10 @@
 #include "ui/gfx/mac/io_surface.h"
 #endif
 
+namespace IPC {
+class MessageFilter;
+}
+
 namespace gpu {
 
 namespace gles2 {
@@ -73,6 +77,11 @@ class GPU_EXPORT ImageTransportSurfaceDelegate {
   virtual void UpdateVSyncParameters(base::TimeTicks timebase,
                                      base::TimeDelta interval) = 0;
 
+  // Add IPC message filter.
+  virtual void AddFilter(IPC::MessageFilter* message_filter) = 0;
+  // Gets route ID for sending / receiving IPC messages.
+  virtual int32_t GetRouteID() const = 0;
+
  protected:
   virtual ~ImageTransportSurfaceDelegate() {}
 };