mus: Get GpuMemoryBuffer from gpu process when possible.

services/ui/ws/gpu_service_proxy.h

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef SERVICES_UI_WS_GPU_SERVICE_PROXY_H_
 #define SERVICES_UI_WS_GPU_SERVICE_PROXY_H_
 
 #include "base/single_thread_task_runner.h"
 #include "base/synchronization/waitable_event.h"
 #include "base/threading/thread.h"
 #include "gpu/config/gpu_info.h"
 #include "gpu/ipc/client/gpu_channel_host.h"
 #include "mojo/public/cpp/bindings/binding_set.h"
 #include "mojo/public/cpp/bindings/interface_request.h"
 #include "services/ui/gpu/gpu_main.h"
 #include "services/ui/gpu/interfaces/gpu_service_internal.mojom.h"
 #include "services/ui/public/interfaces/gpu_service.mojom.h"
 
 namespace ui {
 
-class GpuServiceInternal;
 class MusGpuMemoryBufferManager;
 
 namespace ws {
 
 class GpuServiceProxyDelegate;
 
-// 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 {
+// Sets up connection from clients to the real service implementation in the GPU
+// process.
+class GpuServiceProxy {
  public:
   explicit GpuServiceProxy(GpuServiceProxyDelegate* delegate);
-  ~GpuServiceProxy() override;
+  ~GpuServiceProxy();
 
   void Add(mojom::GpuServiceRequest request);
 
   // Requests a cc::mojom::DisplayCompositor interface from mus-gpu.
   void CreateDisplayCompositor(cc::mojom::DisplayCompositorRequest request,
                                cc::mojom::DisplayCompositorClientPtr client);
 
  private:
   void OnInitialized(const gpu::GPUInfo& gpu_info);
-  void OnGpuChannelEstablished(const EstablishGpuChannelCallback& callback,
-                               int32_t client_id,
-                               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;
 
   GpuServiceProxyDelegate* const delegate_;
   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_;
   std::unique_ptr<MusGpuMemoryBufferManager> gpu_memory_buffer_manager_;
 
   mojom::GpuMainPtr gpu_main_;
 
   // TODO(fsamuel): GpuServiceProxy should not be holding onto |gpu_main_impl|
   // because that will live in another process soon.
   std::unique_ptr<GpuMain> gpu_main_impl_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuServiceProxy);
 };
 
 }  // namespace ws
 }  // namespace ui
 
 #endif  // SERVICES_UI_WS_GPU_SERVICE_PROXY_H_