Plumb GpuMemoryBuffer allocation to GPU process.

content/common/gpu/client/gpu_channel_host.h

Index: content/common/gpu/client/gpu_channel_host.h
diff --git a/content/common/gpu/client/gpu_channel_host.h b/content/common/gpu/client/gpu_channel_host.h
index 4f5b74f010d3ad22d4ee963a1751d5cf4ace05b1..2de8065dae17b4fe161312a3610969c16ae5a512 100644
--- a/content/common/gpu/client/gpu_channel_host.h
+++ b/content/common/gpu/client/gpu_channel_host.h
@@ -84,6 +84,24 @@ class CONTENT_EXPORT GpuChannelHostFactory {
       unsigned usage) = 0;
 };
 
+class CONTENT_EXPORT GpuChannelHostGpuBufferFactory {
+ public:
+  typedef base::Callback<void(const gfx::GpuMemoryBufferHandle& handle)>
+      CreateGpuMemoryBufferCallback;
+
+  virtual ~GpuChannelHostGpuBufferFactory() {}
+
+  virtual void CreateGpuMemoryBuffer(
+      size_t width,
+      size_t height,
+      unsigned internalformat,
+      unsigned usage,
+      const gfx::GpuMemoryBufferHandle& handle,
+      const CreateGpuMemoryBufferCallback& callback) = 0;
+  virtual void DeleteGpuMemoryBuffer(const gfx::GpuMemoryBufferHandle& handle,
+                                     int32 sync_point) = 0;
+};
+
 // Encapsulates an IPC channel between the client and one GPU process.
 // On the GPU process side there's a corresponding GpuChannel.
 // Every method can be called on any thread with a message loop, except for the