Refactor so chromium only GL extensions require gl2extchromium.h

gpu/command_buffer/tests/gl_bind_uniform_location_unittest.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 <GLES2/gl2.h>
 #include <GLES2/gl2ext.h>
+#include <GLES2/gl2extchromium.h>
 
 #include "gpu/command_buffer/tests/gl_manager.h"
 #include "gpu/command_buffer/tests/gl_test_utils.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 #define SHADER(Src) #Src
 
 namespace gpu {
 
@@ skipping 197 matching lines @@
       GLTestHelper::CheckPixels(0, 0, kResolution, kResolution, 1, expected));
 
   GLTestHelper::CheckGLError("no errors", __LINE__);
 
 }
 
 }  // namespace gpu