Add multi-process GpuMemoryBuffer framework.

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 ca311839d9c098d4fcd8308a80a248d727ffff46..0e10ecec47554d822cc9798ad8ddcddf71f1a078 100644
--- a/content/browser/gpu/browser_gpu_channel_host_factory.h
+++ b/content/browser/gpu/browser_gpu_channel_host_factory.h
@@ -38,6 +38,10 @@ class CONTENT_EXPORT BrowserGpuChannelHostFactory
   virtual void DeleteImage(int32 image_idu, int32 sync_point) OVERRIDE;
   virtual GpuChannelHost* EstablishGpuChannelSync(
       CauseForGpuLaunch cause_for_gpu_launch) OVERRIDE;
+  virtual scoped_ptr<gfx::GpuMemoryBuffer> AllocateGpuMemoryBuffer(
+      size_t width,
+      size_t height,
+      unsigned internalformat) OVERRIDE;
 
   // Specify a task runner and callback to be used for a set of messages. The
   // callback will be set up on the current GpuProcessHost, identified by