Refactor so chromium only GL extensions require gl2extchromium.h

cc/test/fake_web_graphics_context_3d.cc

 // Copyright 2011 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 "cc/test/fake_web_graphics_context_3d.h"
 
 #include <algorithm>
 #include <string>
 
 #include "base/logging.h"
+#include "gpu/GLES2/gl2extchromium.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "third_party/khronos/GLES2/gl2ext.h"
 
 using WebKit::WGC3Dboolean;
 using WebKit::WGC3Denum;
 using WebKit::WebGLId;
 using WebKit::WebGraphicsContext3D;
 
 namespace cc {
 
@@ skipping 386 matching lines @@
 }
 
 WebKit::WebGLId FakeWebGraphicsContext3D::NextTextureId() {
   WebGLId texture_id = next_texture_id_++;
   DCHECK(texture_id < (1 << 16));
   texture_id |= context_id_ << 16;
   return texture_id;
 }
 
 }  // namespace cc