Refactor so chromium only GL extensions require gl2extchromium.h

cc/io_surface_layer_impl.cc

 // Copyright 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 "cc/io_surface_layer_impl.h"
 
 #include "base/stringprintf.h"
 #include "cc/gl_renderer.h" // For the GLC() macro.
 #include "cc/io_surface_draw_quad.h"
 #include "cc/layer_tree_impl.h"
 #include "cc/output_surface.h"
 #include "cc/quad_sink.h"
+#include "gpu/GLES2/gl2extchromium.h"
 #include "third_party/WebKit/Source/Platform/chromium/public/WebGraphicsContext3D.h"
 #include "third_party/khronos/GLES2/gl2.h"
 #include "third_party/khronos/GLES2/gl2ext.h"
 
 namespace cc {
 
 IOSurfaceLayerImpl::IOSurfaceLayerImpl(LayerTreeImpl* treeImpl, int id)
     : LayerImpl(treeImpl, id)
     , m_ioSurfaceId(0)
     , m_ioSurfaceChanged(false)
@@ skipping 84 matching lines @@
     m_ioSurfaceId = ioSurfaceId;
     m_ioSurfaceSize = size;
 }
 
 const char* IOSurfaceLayerImpl::layerTypeAsString() const
 {
     return "IOSurfaceLayer";
 }
 
 }  // namespace cc