Use GpuPreferences to avoid directly accessing switches in gpu related code

content/gpu/gpu_child_thread.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 CONTENT_GPU_GPU_CHILD_THREAD_H_
 #define CONTENT_GPU_GPU_CHILD_THREAD_H_
 
 #include <stdint.h>
 
 #include <queue>
 #include <string>
 
 #include "base/command_line.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/time/time.h"
 #include "build/build_config.h"
 #include "content/child/child_thread_impl.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 "content/common/gpu/gpu_config.h"
 #include "content/common/gpu/x_util.h"
 #include "content/common/process_control.mojom.h"
+#include "gpu/command_buffer/service/gpu_preferences.h"
 #include "gpu/config/gpu_info.h"
 #include "mojo/public/cpp/bindings/binding_set.h"
 #include "mojo/public/cpp/bindings/interface_request.h"
 #include "ui/gfx/native_widget_types.h"
 
 namespace gpu {
 class SyncPointManager;
 }
 
 namespace sandbox {
@@ skipping 14 matching lines @@
  public:
   typedef std::queue<IPC::Message*> DeferredMessages;
 
   GpuChildThread(GpuWatchdogThread* gpu_watchdog_thread,
                  bool dead_on_arrival,
                  const gpu::GPUInfo& gpu_info,
                  const DeferredMessages& deferred_messages,
                  GpuMemoryBufferFactory* gpu_memory_buffer_factory,
                  gpu::SyncPointManager* sync_point_manager);
 
-  GpuChildThread(const InProcessChildThreadParams& params,
+  GpuChildThread(const gpu::GpuPreferences& gpu_preferences,
+                 const InProcessChildThreadParams& params,
                  GpuMemoryBufferFactory* gpu_memory_buffer_factory,
                  gpu::SyncPointManager* sync_point_manager);
 
   ~GpuChildThread() override;
 
   void Shutdown() override;
 
   void Init(const base::Time& process_start_time);
   void StopWatchdog();
 
+  static gpu::GpuPreferences GetGpuPreferencesFromCommandLine();
+
+ private:
   // ChildThread overrides.
   bool Send(IPC::Message* msg) override;
   bool OnControlMessageReceived(const IPC::Message& msg) override;
   bool OnMessageReceived(const IPC::Message& msg) override;
 
- private:
   // GpuChannelManagerDelegate implementation.
   void AddSubscription(int32_t client_id, unsigned int target) override;
   void ChannelEstablished(const IPC::ChannelHandle& channel_handle) override;
   void DidCreateOffscreenContext(const GURL& active_url) override;
   void DidDestroyChannel(int client_id) override;
   void DidDestroyOffscreenContext(const GURL& active_url) override;
   void DidLoseContext(bool offscreen,
                       gpu::error::ContextLostReason reason,
                       const GURL& active_url) override;
   void GpuMemoryUmaStats(const GPUMemoryUmaStats& params) override;
@@ skipping 37 matching lines @@
                           unsigned int target,
                           const gpu::ValueState& state);
 #if defined(OS_ANDROID)
   void OnWakeUpGpu();
 #endif
   void OnLoseAllContexts();
 
   void BindProcessControlRequest(
       mojo::InterfaceRequest<ProcessControl> request);
 
+  gpu::GpuPreferences gpu_preferences_;
+
   // Set this flag to true if a fatal error occurred before we receive the
   // OnInitialize message, in which case we just declare ourselves DOA.
   bool dead_on_arrival_;
   base::Time process_start_time_;
   scoped_refptr<GpuWatchdogThread> watchdog_thread_;
 
 #if defined(OS_WIN)
   // Windows specific client sandbox interface.
   sandbox::TargetServices* target_services_;
 #endif
@@ skipping 20 matching lines @@
 
   // Bindings to the ProcessControl impl.
   mojo::BindingSet<ProcessControl> process_control_bindings_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuChildThread);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_GPU_GPU_CHILD_THREAD_H_