ui: Add ref-counting to GLFence class.

gpu/ipc/service/gpu_channel.h

 // Copyright (c) 2012 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 GPU_IPC_SERVICE_GPU_CHANNEL_H_
 #define GPU_IPC_SERVICE_GPU_CHANNEL_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 138 matching lines @@
 
   uint64_t GetMemoryUsage();
 
   scoped_refptr<gl::GLImage> CreateImageForGpuMemoryBuffer(
       const gfx::GpuMemoryBufferHandle& handle,
       const gfx::Size& size,
       gfx::BufferFormat format,
       uint32_t internalformat,
       SurfaceHandle surface_handle);
 
-  std::unique_ptr<gl::GLFence> CreateFenceForGpuFence(
+  scoped_refptr<gl::GLFence> CreateFenceForGpuFence(
       const gfx::GpuFenceHandle& handle);
 
   GpuChannelMessageFilter* filter() const { return filter_.get(); }
 
   // Returns the global order number for the last processed IPC message.
   uint32_t GetProcessedOrderNum() const;
 
   // Returns the global order number for the last unprocessed IPC message.
   uint32_t GetUnprocessedOrderNum() const;
 
@@ skipping 311 matching lines @@
   scoped_refptr<PreemptionFlag> preempting_flag_;
   scoped_refptr<PreemptionFlag> preempted_flag_;
   SyncPointManager* const sync_point_manager_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuChannelMessageQueue);
 };
 
 }  // namespace gpu
 
 #endif  // GPU_IPC_SERVICE_GPU_CHANNEL_H_