gpu: Remove unused GpuChildThread::gpu_preferences_.

gpu/ipc/service/gpu_channel_manager.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_MANAGER_H_
 #define GPU_IPC_SERVICE_GPU_CHANNEL_MANAGER_H_
 
 #include <stdint.h>
 
 #include <deque>
 #include <memory>
 #include <string>
 #include <vector>
 
 #include "base/containers/scoped_ptr_hash_map.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 #include "build/build_config.h"
 #include "gpu/command_buffer/common/constants.h"
+#include "gpu/command_buffer/service/gpu_preferences.h"
 #include "gpu/config/gpu_driver_bug_workarounds.h"
 #include "gpu/gpu_export.h"
 #include "gpu/ipc/service/gpu_memory_manager.h"
 #include "ui/gfx/gpu_memory_buffer.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/gl/gl_surface.h"
 #include "url/gurl.h"
 
 namespace base {
 class WaitableEvent;
@@ skipping 131 matching lines @@
 
  private:
   void InternalDestroyGpuMemoryBuffer(gfx::GpuMemoryBufferId id, int client_id);
   void InternalDestroyGpuMemoryBufferOnIO(gfx::GpuMemoryBufferId id,
                                           int client_id);
 #if defined(OS_ANDROID)
   void ScheduleWakeUpGpu();
   void DoWakeUpGpu();
 #endif
 
-  const GpuPreferences& gpu_preferences_;
+  const GpuPreferences gpu_preferences_;
   GpuDriverBugWorkarounds gpu_driver_bug_workarounds_;
 
   GpuChannelManagerDelegate* const delegate_;
 
   GpuWatchdogThread* watchdog_;
 
   base::WaitableEvent* shutdown_event_;
 
   scoped_refptr<gl::GLShareGroup> share_group_;
   scoped_refptr<gles2::MailboxManager> mailbox_manager_;
@@ skipping 22 matching lines @@
   // that any WeakPtrs to Controller are invalidated before its members
   // variable's destructors are executed, rendering them invalid.
   base::WeakPtrFactory<GpuChannelManager> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuChannelManager);
 };
 
 }  // namespace gpu
 
 #endif  // GPU_IPC_SERVICE_GPU_CHANNEL_MANAGER_H_