Use GpuPreferences to avoid directly accessing switches in gpu related code

android_webview/browser/deferred_gpu_command_service.h

 // Copyright 2014 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 ANDROID_WEBVIEW_BROWSER_DEFERRED_GPU_COMMAND_SERVICE_H_
 #define ANDROID_WEBVIEW_BROWSER_DEFERRED_GPU_COMMAND_SERVICE_H_
 
 #include <stddef.h>
 
 #include <queue>
 #include <utility>
 
 #include "base/lazy_instance.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/threading/thread_local.h"
 #include "base/time/time.h"
+#include "gpu/command_buffer/service/gpu_preferences.h"
 #include "gpu/command_buffer/service/in_process_command_buffer.h"
 
 namespace gpu {
 class SyncPointManager;
 }
 
 namespace android_webview {
 
 class ScopedAllowGL {
  public:
@@ skipping 37 matching lines @@
 
  protected:
   ~DeferredGpuCommandService() override;
   friend class base::RefCountedThreadSafe<DeferredGpuCommandService>;
 
  private:
   friend class ScopedAllowGL;
   static void RequestProcessGL(bool for_idle);
 
   DeferredGpuCommandService();
+  void InitGpuPreferences();
   size_t IdleQueueSize();
 
   base::Lock tasks_lock_;
+  gpu::GpuPreferences gpu_preferences_;
   std::queue<base::Closure> tasks_;
   std::queue<std::pair<base::Time, base::Closure> > idle_tasks_;
 
   scoped_ptr<gpu::SyncPointManager> sync_point_manager_;
   scoped_refptr<gpu::gles2::ShaderTranslatorCache> shader_translator_cache_;
   scoped_refptr<gpu::gles2::FramebufferCompletenessCache>
       framebuffer_completeness_cache_;
   DISALLOW_COPY_AND_ASSIGN(DeferredGpuCommandService);
 };
 
 }  // namespace android_webview
 
 #endif  // ANDROID_WEBVIEW_BROWSER_DEFERRED_GPU_COMMAND_SERVICE_H_