Use GpuPreferences to avoid directly accessing switches in gpu related code

gpu/gles2_conform_support/egl/display.cc

 // 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.
 
 #include "gpu/gles2_conform_support/egl/display.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <vector>
@@ skipping 148 matching lines @@
         new gpu::TransferBufferManager(nullptr);
     transfer_buffer_manager_ = manager;
     manager->Initialize();
   }
   scoped_ptr<gpu::CommandBufferService> command_buffer(
       new gpu::CommandBufferService(transfer_buffer_manager_.get()));
   if (!command_buffer->Initialize())
     return NULL;
 
   scoped_refptr<gpu::gles2::ContextGroup> group(new gpu::gles2::ContextGroup(
-      NULL, NULL, new gpu::gles2::ShaderTranslatorCache,
+      gpu_preferences_, NULL, NULL,
+      new gpu::gles2::ShaderTranslatorCache(gpu_preferences_),
       new gpu::gles2::FramebufferCompletenessCache, NULL, NULL, NULL, true));
 
   decoder_.reset(gpu::gles2::GLES2Decoder::Create(group.get()));
   if (!decoder_.get())
     return EGL_NO_SURFACE;
 
   gpu_scheduler_.reset(new gpu::GpuScheduler(command_buffer.get(),
                                              decoder_.get(),
                                              NULL));
 
@@ skipping 216 matching lines @@
 void Display::SignalSyncToken(const gpu::SyncToken& sync_token,
                               const base::Closure& callback) {
   NOTIMPLEMENTED();
 }
 
 bool Display::CanWaitUnverifiedSyncToken(const gpu::SyncToken* sync_token) {
   return false;
 }
 
 }  // namespace egl