Add a GpuMemoryBuffer pool that creates hardware backed VideoFrames.

media/renderers/mock_gpu_video_accelerator_factories.h

Index: media/renderers/mock_gpu_video_accelerator_factories.h
diff --git a/media/renderers/mock_gpu_video_accelerator_factories.h b/media/renderers/mock_gpu_video_accelerator_factories.h
index 9bbbb89b0c4811a024eb0e6c029fadc53d0dc9b6..d08f21120d2bb1dce5289432996106908815382e 100644
--- a/media/renderers/mock_gpu_video_accelerator_factories.h
+++ b/media/renderers/mock_gpu_video_accelerator_factories.h
@@ -44,6 +44,12 @@ class MockGpuVideoAcceleratorFactories : public GpuVideoAcceleratorFactories {
   MOCK_METHOD0(GetVideoEncodeAcceleratorSupportedProfiles,
                VideoEncodeAccelerator::SupportedProfiles());
 
+  scoped_ptr<gfx::GpuMemoryBuffer> AllocateGpuMemoryBuffer(
+      const gfx::Size& size,
+      gfx::GpuMemoryBuffer::Format format,
+      gfx::GpuMemoryBuffer::Usage usage) override;
+  MOCK_METHOD0(GetGLES2Interface, gpu::gles2::GLES2Interface*());
+
   scoped_ptr<base::SharedMemory> CreateSharedMemory(size_t size) override;
 
   scoped_ptr<VideoDecodeAccelerator> CreateVideoDecodeAccelerator() override;