Enable sync allocation of GpuMemoryBuffers from the browser process.

content/browser/gpu/browser_gpu_channel_host_factory.h

Index: content/browser/gpu/browser_gpu_channel_host_factory.h
diff --git a/content/browser/gpu/browser_gpu_channel_host_factory.h b/content/browser/gpu/browser_gpu_channel_host_factory.h
index a7c1b57059478fea9cb2634de32ad88028f66b39..d6f4de4582c8aad254d3e35be00138d25821d776 100644
--- a/content/browser/gpu/browser_gpu_channel_host_factory.h
+++ b/content/browser/gpu/browser_gpu_channel_host_factory.h
@@ -48,6 +48,11 @@ class CONTENT_EXPORT BrowserGpuChannelHostFactory
       unsigned internalformat,
       unsigned usage,
       const CreateGpuMemoryBufferCallback& callback) OVERRIDE;
+  virtual gfx::GpuMemoryBufferHandle CreateGpuMemoryBufferSync(
+      const gfx::GpuMemoryBufferHandle& handle,
+      const gfx::Size& size,
+      unsigned internalformat,
+      unsigned usage) OVERRIDE;
   virtual void DestroyGpuMemoryBuffer(const gfx::GpuMemoryBufferHandle& handle,
                                       int32 sync_point) OVERRIDE;
 
@@ -72,6 +77,7 @@ class CONTENT_EXPORT BrowserGpuChannelHostFactory
 
  private:
   struct CreateRequest;
+  class CreateGpuMemoryBufferRequest;
   class EstablishRequest;
 
   BrowserGpuChannelHostFactory();
@@ -87,13 +93,14 @@ class CONTENT_EXPORT BrowserGpuChannelHostFactory
   static void AddFilterOnIO(int gpu_host_id,
                             scoped_refptr<IPC::MessageFilter> filter);
 
-  void CreateGpuMemoryBufferOnIO(const gfx::GpuMemoryBufferHandle& handle,
-                                 const gfx::Size& size,
-                                 unsigned internalformat,
-                                 unsigned usage,
-                                 uint32 request_id);
+  void CreateGpuMemoryBufferOnIO(
+      const gfx::GpuMemoryBufferHandle& handle,
+      const gfx::Size& size,
+      unsigned internalformat,
+      unsigned usage,
+      scoped_refptr<CreateGpuMemoryBufferRequest> request);
   void GpuMemoryBufferCreatedOnIO(
-      uint32 request_id,
+      scoped_refptr<CreateGpuMemoryBufferRequest> request,
       const gfx::GpuMemoryBufferHandle& handle);
   void OnGpuMemoryBufferCreated(
       uint32 request_id,