Refactor so chromium only GL extensions require gl2extchromium.h

gpu/command_buffer/client/gles2_implementation.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.
 
 // A class to emulate GLES2 over command buffers.
 
 #include "../client/gles2_implementation.h"
 
 #include <algorithm>
 #include <map>
 #include <queue>
 #include <set>
 #include <limits>
 #include <stdio.h>
 #include <string.h>
 #include <GLES2/gl2ext.h>
+#include <GLES2/gl2extchromium.h>
 #include "../client/buffer_tracker.h"
 #include "../client/mapped_memory.h"
 #include "../client/program_info_manager.h"
 #include "../client/query_tracker.h"
 #include "../client/transfer_buffer.h"
 #include "../client/vertex_array_object_manager.h"
 #include "../common/gles2_cmd_utils.h"
 #include "../common/trace_event.h"
 
 #if defined(__native_client__) && !defined(GLES2_SUPPORT_CLIENT_SIDE_ARRAYS)
@@ skipping 3391 matching lines @@
   return;
 }
 
 // Include the auto-generated part of this file. We split this because it means
 // we can easily edit the non-auto generated parts right here in this file
 // instead of having to edit some template or the code generator.
 #include "../client/gles2_implementation_impl_autogen.h"
 
 }  // namespace gles2
 }  // namespace gpu