Use GpuPreferences to avoid directly accessing switches in gpu related code

gpu/gles2_conform_support/egl/display.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_GLES2_CONFORM_SUPPORT_EGL_DISPLAY_H_
 #define GPU_GLES2_CONFORM_SUPPORT_EGL_DISPLAY_H_
 
 #include <EGL/egl.h>
 #include <stddef.h>
 #include <stdint.h>
 
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "gpu/command_buffer/client/gles2_cmd_helper.h"
 #include "gpu/command_buffer/client/gpu_control.h"
 #include "gpu/command_buffer/service/command_buffer_service.h"
 #include "gpu/command_buffer/service/gles2_cmd_decoder.h"
+#include "gpu/command_buffer/service/gpu_preferences.h"
 #include "gpu/command_buffer/service/gpu_scheduler.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/gl/gl_context.h"
 #include "ui/gl/gl_surface.h"
 
 namespace gpu {
 class CommandBufferService;
 class GpuControl;
 class GpuScheduler;
 class TransferBuffer;
@@ skipping 70 matching lines @@
   bool IsFenceSyncRelease(uint64_t release) override;
   bool IsFenceSyncFlushed(uint64_t release) override;
   bool IsFenceSyncFlushReceived(uint64_t release) override;
   void SignalSyncToken(const gpu::SyncToken& sync_token,
                        const base::Closure& callback) override;
   bool CanWaitUnverifiedSyncToken(const gpu::SyncToken* sync_token) override;
 
  private:
   EGLNativeDisplayType display_id_;
 
+  gpu::GpuPreferences gpu_preferences_;
   bool is_initialized_;
 
   bool create_offscreen_;
   int create_offscreen_width_;
   int create_offscreen_height_;
   uint64_t next_fence_sync_release_;
 
   scoped_refptr<gpu::TransferBufferManagerInterface> transfer_buffer_manager_;
   scoped_ptr<gpu::CommandBufferService> command_buffer_;
   scoped_ptr<gpu::GpuScheduler> gpu_scheduler_;
   scoped_ptr<gpu::gles2::GLES2Decoder> decoder_;
   scoped_refptr<gfx::GLContext> gl_context_;
   scoped_refptr<gfx::GLSurface> gl_surface_;
   scoped_ptr<gpu::gles2::GLES2CmdHelper> gles2_cmd_helper_;
   scoped_ptr<gpu::TransferBuffer> transfer_buffer_;
 
   // TODO(alokp): Support more than one config, surface, and context.
   scoped_ptr<Config> config_;
   scoped_ptr<Surface> surface_;
   scoped_ptr<gpu::gles2::GLES2Implementation> context_;
 
   DISALLOW_COPY_AND_ASSIGN(Display);
 };
 
 }  // namespace egl
 
 #endif  // GPU_GLES2_CONFORM_SUPPORT_EGL_DISPLAY_H_