Implement native GMB backbuffers in the GLES2 Command Decoder.

gpu/ipc/service/gpu_memory_buffer_factory_surface_texture.h

Index: gpu/ipc/service/gpu_memory_buffer_factory_surface_texture.h
diff --git a/gpu/ipc/service/gpu_memory_buffer_factory_surface_texture.h b/gpu/ipc/service/gpu_memory_buffer_factory_surface_texture.h
index 8a58e17d6c8760ad99baf42d12ad3a951709707b..04f2b8e6985b690b8a11f30b2ae4589f1075fceb 100644
--- a/gpu/ipc/service/gpu_memory_buffer_factory_surface_texture.h
+++ b/gpu/ipc/service/gpu_memory_buffer_factory_surface_texture.h
@@ -49,6 +49,10 @@ class GPU_EXPORT GpuMemoryBufferFactorySurfaceTexture
       gfx::BufferFormat format,
       unsigned internalformat,
       int client_id) override;
+  scoped_refptr<gl::GLImage> CreateAnonymousImage(
+      const gfx::Size& size,
+      gfx::BufferFormat format,
+      unsigned internalformat) override;
 
  private:
   typedef std::pair<int, int> SurfaceTextureMapKey;