Route IPC through browser when creating a viewable command buffer.

chrome/gpu/gpu_thread.h

Index: chrome/gpu/gpu_thread.h
diff --git a/chrome/gpu/gpu_thread.h b/chrome/gpu/gpu_thread.h
index 6928645e5058fe49b4713ffd75cc8e378076c030..76ad6f24bf8fde41fa13f1fadfb4045cf01bd139 100644
--- a/chrome/gpu/gpu_thread.h
+++ b/chrome/gpu/gpu_thread.h
@@ -51,6 +51,11 @@ class GpuThread : public ChildThread {
   void OnCloseChannel(const IPC::ChannelHandle& channel_handle);
   void OnSynchronize();
   void OnCollectGraphicsInfo();
+  void OnCreateViewCommandBuffer(
+      gfx::PluginWindowHandle window,
+      int32 render_view_id,
+      int32 renderer_id,
+      const GPUCreateCommandBufferConfig& init_params);
 #if defined(OS_MACOSX)
   void OnAcceleratedSurfaceBuffersSwappedACK(
       int renderer_id, int32 route_id, uint64 swap_buffers_count);