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

gpu/command_buffer/service/gles2_cmd_decoder_unittest_2_autogen.h

 // Copyright 2014 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 is auto-generated from
 // gpu/command_buffer/build_gles2_cmd_buffer.py
 // It's formatted by clang-format using chromium coding style:
 //    clang-format -i -style=chromium filename
 // DO NOT EDIT!
 
@@ skipping 625 matching lines @@
 }
 
 TEST_P(GLES2DecoderTest2, ViewportInvalidArgs3_0) {
   EXPECT_CALL(*gl_, Viewport(_, _, _, _)).Times(0);
   SpecializedSetup<cmds::Viewport, 0>(false);
   cmds::Viewport cmd;
   cmd.Init(1, 2, 3, -1);
   EXPECT_EQ(error::kNoError, ExecuteCmd(cmd));
   EXPECT_EQ(GL_INVALID_VALUE, GetGLError());
 }
-// TODO(gman): BlitFramebufferCHROMIUM
-// TODO(gman): RenderbufferStorageMultisampleCHROMIUM
-// TODO(gman): RenderbufferStorageMultisampleEXT
-// TODO(gman): FramebufferTexture2DMultisampleEXT
 // TODO(gman): TexStorage2DEXT
 // TODO(gman): GenQueriesEXTImmediate
 // TODO(gman): DeleteQueriesEXTImmediate
 // TODO(gman): BeginQueryEXT
 
 // TODO(gman): EndQueryEXT
 
 // TODO(gman): InsertEventMarkerEXT
 
 // TODO(gman): PushGroupMarkerEXT
@@ skipping 48 matching lines @@
 
 // TODO(gman): TraceEndCHROMIUM
 // TODO(gman): AsyncTexSubImage2DCHROMIUM
 
 // TODO(gman): AsyncTexImage2DCHROMIUM
 
 // TODO(gman): WaitAsyncTexImage2DCHROMIUM
 
 // TODO(gman): WaitAllAsyncTexImage2DCHROMIUM
 
-// TODO(gman): DiscardFramebufferEXTImmediate
 // TODO(gman): LoseContextCHROMIUM
 // TODO(gman): InsertSyncPointCHROMIUM
 
 // TODO(gman): WaitSyncPointCHROMIUM
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_DECODER_UNITTEST_2_AUTOGEN_H_