gpu: Refactor GpuMemoryBuffer framework for multi-process support.

gpu/command_buffer/client/client_test_helper.h

Index: gpu/command_buffer/client/client_test_helper.h
diff --git a/gpu/command_buffer/client/client_test_helper.h b/gpu/command_buffer/client/client_test_helper.h
index 70107046660bff63af63515389c2ebdfe0df0b24..e26f320ffcb8551aa0b6a901c1bf2ecaf8529942 100644
--- a/gpu/command_buffer/client/client_test_helper.h
+++ b/gpu/command_buffer/client/client_test_helper.h
@@ -39,6 +39,12 @@ class MockCommandBufferBase : public CommandBuffer {
   virtual void SetParseError(error::Error error) OVERRIDE;
   virtual void SetContextLostReason(error::ContextLostReason reason) OVERRIDE;
   virtual uint32 InsertSyncPoint() OVERRIDE;
+  virtual gfx::GpuMemoryBuffer* CreateGpuMemoryBuffer(
+      size_t width,
+      size_t height,
+      unsigned internalformat,
+      int32* id) OVERRIDE;
+  virtual void DestroyGpuMemoryBuffer(int32 id) OVERRIDE;
 
   // Get's the Id of the next transfer buffer that will be returned
   // by CreateTransferBuffer. This is useful for testing expected ids.