Use GpuPreferences to avoid directly accessing switches in gpu related code

gpu/command_buffer/service/mocks.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.
 
 // This file contains definitions for mock objects, used for testing.
 
 // TODO(apatrick): This file "manually" defines some mock objects. Using gMock
 // would be definitely preferable, unfortunately it doesn't work on Windows yet.
 
 #ifndef GPU_COMMAND_BUFFER_SERVICE_MOCKS_H_
@@ skipping 74 matching lines @@
  private:
   CommandBufferEngine *engine_;
 };
 
 namespace gles2 {
 
 class MockShaderTranslator : public ShaderTranslatorInterface {
  public:
   MockShaderTranslator();
 
-  MOCK_METHOD5(Init,
+  MOCK_METHOD6(Init,
                bool(sh::GLenum shader_type,
                     ShShaderSpec shader_spec,
                     const ShBuiltInResources* resources,
                     ShShaderOutput shader_output_language,
-                    ShCompileOptions driver_bug_workarounds));
+                    ShCompileOptions driver_bug_workarounds,
+                    bool gl_shader_interm_output));
   MOCK_CONST_METHOD10(Translate,
                       bool(const std::string& shader_source,
                            std::string* info_log,
                            std::string* translated_source,
                            int* shader_version,
                            AttributeMap* attrib_map,
                            UniformMap* uniform_map,
                            VaryingMap* varying_map,
                            InterfaceBlockMap* interface_block_map,
                            OutputVariableList* output_variable_list,
@@ skipping 46 matching lines @@
  private:
   friend class ::testing::StrictMock<MockMemoryTracker>;
   friend class base::RefCounted< ::testing::StrictMock<MockMemoryTracker> >;
   virtual ~MockMemoryTracker();
 };
 
 }  // namespace gles2
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_MOCKS_H_