Mus: Implement GpuMain mojo interface

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"
@@ skipping 46 matching lines @@
   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_;
-  GpuMain gpu_main_;
+
+  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_