Make it possible to test command buffer decoder functions with extension flags

gpu/command_buffer/service/gles2_cmd_decoder_unittest_extensions.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/gles2_cmd_decoder.h"
+
+#include "gpu/command_buffer/common/gles2_cmd_format.h"
+#include "gpu/command_buffer/common/gles2_cmd_utils.h"
+#include "gpu/command_buffer/service/gles2_cmd_decoder_unittest_base.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "ui/gl/gl_mock.h"
+
+using ::gfx::MockGLInterface;
+using ::testing::_;
+
+namespace gpu {
+namespace gles2 {
+
+#include "gpu/command_buffer/service/gles2_cmd_decoder_unittest_extensions_autogen.h"
+
+}  // namespace gles2
+}  // namespace gpu
+