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 <vector>
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/synchronization/lock.h"
+#include "gpu/command_buffer/service/gpu_preferences.h"
 
 namespace egl {
 
 class Config;
 class Context;
 class Surface;
 class ThreadState;
 
 class Display {
  public:
@@ skipping 38 matching lines @@
   // Context routines.
   EGLContext CreateContext(ThreadState*,
                            EGLConfig,
                            EGLSurface share_ctx,
                            const EGLint* attrib_list);
   EGLBoolean DestroyContext(ThreadState*, EGLContext);
 
   EGLBoolean ReleaseCurrent(ThreadState*);
   EGLBoolean MakeCurrent(ThreadState*, EGLSurface, EGLSurface, EGLContext);
 
+  const gpu::GpuPreferences& gpu_preferences() const {
+    return gpu_preferences_;
+  }
   uint64_t GenerateFenceSyncRelease();
   bool IsFenceSyncRelease(uint64_t release);
   bool IsFenceSyncFlushed(uint64_t release);
   bool IsFenceSyncFlushReceived(uint64_t release);
 
  private:
   void InitializeConfigsIfNeeded();
   const Config* GetConfig(EGLConfig);
   Surface* GetSurface(EGLSurface);
   Context* GetContext(EGLContext);
 
   base::Lock lock_;
+  gpu::GpuPreferences gpu_preferences_;
   bool is_initialized_;
   uint64_t next_fence_sync_release_;
   std::vector<scoped_refptr<Surface>> surfaces_;
   std::vector<scoped_refptr<Context>> contexts_;
   scoped_ptr<Config> configs_[2];
 
   DISALLOW_COPY_AND_ASSIGN(Display);
 };
 
 }  // namespace egl
 
 #endif  // GPU_GLES2_CONFORM_SUPPORT_EGL_DISPLAY_H_