Impl mus::mojom::GpuService to enable using Chrome IPC version gpu CmdBuf in mus

components/mus/surfaces/surfaces_context_provider.h

Index: components/mus/surfaces/surfaces_context_provider.h
diff --git a/components/mus/surfaces/surfaces_context_provider.h b/components/mus/surfaces/surfaces_context_provider.h
index 5da9ef174c5c5c41bb80ec3cb453a8dfaa34eff3..cfe080d1a3ca20ffe373be926c0bd90ce0039124 100644
--- a/components/mus/surfaces/surfaces_context_provider.h
+++ b/components/mus/surfaces/surfaces_context_provider.h
@@ -18,6 +18,7 @@
 
 namespace gpu {
 
+class CommandBufferProxyImpl;
 class TransferBuffer;
 
 namespace gles2 {
@@ -69,6 +70,8 @@ class SurfacesContextProvider : public cc::ContextProvider,
   void UpdateVSyncParameters(int64_t timebase, int64_t interval) override;
   void GpuCompletedSwapBuffers(gfx::SwapResult result) override;
 
+  bool use_chrome_gpu_command_buffer_;
+
   // From GLES2Context:
   // Initialized in BindToCurrentThread.
   std::unique_ptr<gpu::gles2::GLES2CmdHelper> gles2_helper_;
@@ -81,6 +84,7 @@ class SurfacesContextProvider : public cc::ContextProvider,
   SurfacesContextProviderDelegate* delegate_;
   gfx::AcceleratedWidget widget_;
   CommandBufferLocal* command_buffer_local_;
+  std::unique_ptr<gpu::CommandBufferProxyImpl> command_buffer_proxy_impl_;
 
   gfx::GLSurface::SwapCompletionCallback swap_buffers_completion_callback_;