gpu: Reduce direct use of BrowserGpuMemoryBufferManager

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 a2ba4d1fff5b5f0f6ab3f43fee4a94630a0033fc..f4c5bcaebe6e698a844bd305a98672fcb7d89702 100644
--- a/content/browser/gpu/browser_gpu_channel_host_factory.h
+++ b/content/browser/gpu/browser_gpu_channel_host_factory.h
@@ -40,10 +40,6 @@ class CONTENT_EXPORT BrowserGpuChannelHostFactory
   gpu::GpuChannelHost* GetGpuChannel();
   int GetGpuChannelId() { return gpu_client_id_; }
 
-  // Closes the channel to the GPU process. This should be called before the IO
-  // thread stops.
-  void CloseChannel();
-
   // Overridden from gpu::GpuChannelEstablishFactory:
   // The factory will return a null GpuChannelHost in the callback during
   // shutdown.