services/ui: Initialize all of gpu in one thread.

services/ui/gpu/gpu_service_internal.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_GPU_GPU_SERVICE_INTERNAL_H_
 #define SERVICES_UI_GPU_GPU_SERVICE_INTERNAL_H_
 
 #include "base/callback.h"
 #include "base/synchronization/waitable_event.h"
 #include "base/threading/non_thread_safe.h"
-#include "base/threading/thread.h"
 #include "build/build_config.h"
 #include "gpu/command_buffer/service/gpu_preferences.h"
 #include "gpu/config/gpu_info.h"
 #include "gpu/ipc/common/surface_handle.h"
 #include "gpu/ipc/service/gpu_channel.h"
 #include "gpu/ipc/service/gpu_channel_manager.h"
 #include "gpu/ipc/service/gpu_channel_manager_delegate.h"
 #include "gpu/ipc/service/gpu_config.h"
 #include "gpu/ipc/service/x_util.h"
 #include "mojo/public/cpp/bindings/binding.h"
@@ skipping 36 matching lines @@
       gpu::SurfaceHandle surface_handle);
   void DestroyGpuMemoryBuffer(gfx::GpuMemoryBufferId id,
                               int client_id,
                               const gpu::SyncToken& sync_token);
 
  private:
   friend class GpuMain;
 
   GpuServiceInternal(const gpu::GPUInfo& gpu_info,
                      gpu::GpuWatchdogThread* watchdog,
-                     gpu::GpuMemoryBufferFactory* memory_buffer_factory);
-
-  void BindOnGpuThread(mojom::GpuServiceInternalRequest request);
-  void TearDownGpuThread();
+                     gpu::GpuMemoryBufferFactory* memory_buffer_factory,
+                     scoped_refptr<base::SingleThreadTaskRunner> io_runner);
 
   gfx::GpuMemoryBufferHandle CreateGpuMemoryBufferFromeHandle(
       gfx::GpuMemoryBufferHandle buffer_handle,
       gfx::GpuMemoryBufferId id,
       const gfx::Size& size,
       gfx::BufferFormat format,
       int client_id);
 
   // gpu::GpuChannelManagerDelegate:
   void DidCreateOffscreenContext(const GURL& active_url) override;
@@ skipping 13 matching lines @@
   void SetActiveURL(const GURL& url) override;
 
   // mojom::GpuServiceInternal:
   void Initialize(const InitializeCallback& callback) override;
   void EstablishGpuChannel(
       int32_t client_id,
       uint64_t client_tracing_id,
       bool is_gpu_host,
       const EstablishGpuChannelCallback& callback) override;
 
-  // The main thread task runner.
-  scoped_refptr<base::SingleThreadTaskRunner> main_task_runner_;
+  scoped_refptr<base::SingleThreadTaskRunner> io_runner_;
 
   // An event that will be signalled when we shutdown.
   base::WaitableEvent shutdown_event_;
 
-  // The main thread for GpuService.
-  base::Thread gpu_thread_;
-
-  // The thread that handles IO events for GpuService.
-  base::Thread io_thread_;
-
   gpu::GpuWatchdogThread* watchdog_thread_;
 
   gpu::GpuMemoryBufferFactory* gpu_memory_buffer_factory_;
 
   gpu::GpuPreferences gpu_preferences_;
 
   // Information about the GPU, such as device and vendor ID.
   gpu::GPUInfo gpu_info_;
 
-  // All of the following are created, used, and destroyed in the gpu thread.
   std::unique_ptr<gpu::SyncPointManager> owned_sync_point_manager_;
   std::unique_ptr<gpu::GpuChannelManager> gpu_channel_manager_;
   std::unique_ptr<media::MediaService> media_service_;
   mojo::Binding<mojom::GpuServiceInternal> binding_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuServiceInternal);
 };
 
 }  // namespace ui
 
 #endif  // SERVICES_UI_GPU_GPU_SERVICE_INTERNAL_H_