mus: Get GpuMemoryBuffer from gpu process when possible.

services/ui/ws/gpu_service_proxy.h

Index: services/ui/ws/gpu_service_proxy.h
diff --git a/services/ui/ws/gpu_service_proxy.h b/services/ui/ws/gpu_service_proxy.h
index f5d8446173665a22047830fe3655377dfcd9b1ce..cfaeaba35ea72d56d5ac2f24691e499540de6ba3 100644
--- a/services/ui/ws/gpu_service_proxy.h
+++ b/services/ui/ws/gpu_service_proxy.h
@@ -30,10 +30,9 @@ namespace ws {
 class GpuServiceProxyDelegate;
 class MusGpuMemoryBufferManager;
 
-// The proxy implementation that relays requests from clients to the real
-// service implementation in the GPU process over mojom.GpuServiceInternal.
-class GpuServiceProxy : public mojom::GpuService,
-                        public gpu::GpuChannelHostFactory {
+// Sets up connection from clients to the real service implementation in the GPU
+// process.
+class GpuServiceProxy : public gpu::GpuChannelHostFactory {
  public:
   explicit GpuServiceProxy(GpuServiceProxyDelegate* delegate);
   ~GpuServiceProxy() override;
@@ -42,25 +41,9 @@ class GpuServiceProxy : public mojom::GpuService,
 
  private:
   void OnInitialized(const gpu::GPUInfo& gpu_info);
-  void OnGpuChannelEstablished(const EstablishGpuChannelCallback& callback,
-                               int32_t client_id,
-                               mojo::ScopedMessagePipeHandle channel_handle);
   void OnInternalGpuChannelEstablished(
       mojo::ScopedMessagePipeHandle channel_handle);
 
-  // mojom::GpuService overrides:
-  void EstablishGpuChannel(
-      const EstablishGpuChannelCallback& callback) override;
-  void CreateGpuMemoryBuffer(
-      gfx::GpuMemoryBufferId id,
-      const gfx::Size& size,
-      gfx::BufferFormat format,
-      gfx::BufferUsage usage,
-      const mojom::GpuService::CreateGpuMemoryBufferCallback& callback)
-      override;
-  void DestroyGpuMemoryBuffer(gfx::GpuMemoryBufferId id,
-                              const gpu::SyncToken& sync_token) override;
-
   // gpu::GpuChannelHostFactory overrides:
   bool IsMainThread() override;
   scoped_refptr<base::SingleThreadTaskRunner> GetIOThreadTaskRunner() override;
@@ -71,7 +54,6 @@ class GpuServiceProxy : public mojom::GpuService,
   int32_t next_client_id_;
   scoped_refptr<base::SingleThreadTaskRunner> main_thread_task_runner_;
   mojom::GpuServiceInternalPtr gpu_service_;
-  mojo::BindingSet<mojom::GpuService> bindings_;
   gpu::GPUInfo gpu_info_;
   scoped_refptr<gpu::GpuChannelHost> gpu_channel_;
   base::WaitableEvent shutdown_event_;