Use GpuPreferences to avoid directly accessing switches in gpu related code

gpu/command_buffer/tests/gl_manager.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/command_buffer/tests/gl_manager.h"
 
 #include <GLES2/gl2.h>
 #include <GLES2/gl2ext.h>
 #include <GLES2/gl2extchromium.h>
 #include <stddef.h>
@@ skipping 205 matching lines @@
   attrib_helper.context_type = options.context_type;
 
   attrib_helper.Serialize(&attribs);
 
   DCHECK(!command_line || !context_group);
   if (!context_group) {
     scoped_refptr<gles2::FeatureInfo> feature_info;
     if (command_line)
       feature_info = new gles2::FeatureInfo(*command_line);
     context_group = new gles2::ContextGroup(
-        mailbox_manager_.get(), NULL, new gpu::gles2::ShaderTranslatorCache,
+        gpu_preferences_, mailbox_manager_.get(), NULL,
+        new gpu::gles2::ShaderTranslatorCache(gpu_preferences_),
         new gpu::gles2::FramebufferCompletenessCache, feature_info, NULL, NULL,
         options.bind_generates_resource);
   }
 
   decoder_.reset(::gpu::gles2::GLES2Decoder::Create(context_group));
   if (options.force_shader_name_hashing) {
     decoder_->SetForceShaderNameHashingForTest(true);
   }
   command_buffer_.reset(new CommandBufferService(
       decoder_->GetContextGroup()->transfer_buffer_manager()));
@@ skipping 309 matching lines @@
 
   // Something went wrong, just run the callback now.
   callback.Run();
 }
 
 bool GLManager::CanWaitUnverifiedSyncToken(const gpu::SyncToken* sync_token) {
   return false;
 }
 
 }  // namespace gpu