Use GLVersionInfo instead of gl::GetGLImplementation() to decide GL paths

gpu/command_buffer/service/test_helper.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/service/test_helper.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 1166 matching lines @@
 sh::OutputVariable TestHelper::ConstructOutputVariable(
     GLenum type,
     GLint array_size,
     GLenum precision,
     bool static_use,
     const std::string& name) {
   return ConstructShaderVariable<sh::OutputVariable>(
       type, array_size, precision, static_use, name);
 }
 
-ScopedGLImplementationSetter::ScopedGLImplementationSetter(
-    gl::GLImplementation implementation)
-    : old_implementation_(gl::GetGLImplementation()) {
-  gl::SetGLImplementation(implementation);
-}
-
-ScopedGLImplementationSetter::~ScopedGLImplementationSetter() {
-  gl::SetGLImplementation(old_implementation_);
-}
-
 }  // namespace gles2
 }  // namespace gpu