Use GpuPreferences to avoid directly accessing switches in gpu related code

content/common/gpu/gpu_channel_test_common.h

 // Copyright (c) 2015 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.
 
 #include <stdint.h>
 
 #include "base/memory/scoped_ptr.h"
 #include "content/common/gpu/gpu_channel.h"
 #include "content/common/gpu/gpu_channel_manager.h"
 #include "content/common/gpu/gpu_channel_manager_delegate.h"
+#include "gpu/command_buffer/service/gpu_preferences.h"
 #include "ipc/ipc_test_sink.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace base {
 class TestSimpleTaskRunner;
 }  // namespace base
 
 namespace IPC {
 class TestSink;
 }  // namespace IPC
@@ skipping 36 matching lines @@
       const gfx::PluginWindowHandle& child_window) override;
 #endif
 
   IPC::ChannelHandle last_established_channel_handle_;
 
   DISALLOW_COPY_AND_ASSIGN(TestGpuChannelManagerDelegate);
 };
 
 class TestGpuChannelManager : public GpuChannelManager {
  public:
-  TestGpuChannelManager(GpuChannelManagerDelegate* delegate,
+  TestGpuChannelManager(const gpu::GpuPreferences& gpu_preferences,
+                        GpuChannelManagerDelegate* delegate,
                         base::SingleThreadTaskRunner* task_runner,
                         base::SingleThreadTaskRunner* io_task_runner,
                         gpu::SyncPointManager* sync_point_manager,
                         GpuMemoryBufferFactory* gpu_memory_buffer_factory);
   ~TestGpuChannelManager() override;
 
  protected:
   scoped_ptr<GpuChannel> CreateGpuChannel(
       int client_id,
       uint64_t client_tracing_id,
@@ skipping 36 matching lines @@
   ~GpuChannelTestCommon() override;
 
  protected:
   GpuChannelManager* channel_manager() { return channel_manager_.get(); }
   TestGpuChannelManagerDelegate* channel_manager_delegate() {
     return channel_manager_delegate_.get();
   }
   base::TestSimpleTaskRunner* task_runner() { return task_runner_.get(); }
 
  private:
+  gpu::GpuPreferences gpu_preferences_;
   scoped_refptr<base::TestSimpleTaskRunner> task_runner_;
   scoped_refptr<base::TestSimpleTaskRunner> io_task_runner_;
   scoped_ptr<gpu::SyncPointManager> sync_point_manager_;
   scoped_ptr<TestGpuChannelManagerDelegate> channel_manager_delegate_;
   scoped_ptr<GpuChannelManager> channel_manager_;
 };
 
 }  // namespace content