Replace OVERRIDE with its C++11 counterparts in src/skia

skia/ext/opacity_draw_filter.h

 // Copyright 2013 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.
 
 #ifndef SKIA_EXT_OPACITY_DRAW_FILTER_H
 #define SKIA_EXT_OPACITY_DRAW_FILTER_H
 
 #include "base/values.h"
 #include "third_party/skia/include/core/SkDrawFilter.h"
 
 class SkPaint;
 
 namespace skia {
 
 // This filter allows setting an opacity on every draw call to a canvas, and to
 // disable image filtering. Note that the opacity setting is only correct in
 // very limited conditions: when there is only zero or one opaque, nonlayer
 // draw for every pixel in the surface.
 class SK_API OpacityDrawFilter : public SkDrawFilter {
  public:
   OpacityDrawFilter(float opacity, bool disable_image_filtering);
   virtual ~OpacityDrawFilter();
-  virtual bool filter(SkPaint* paint, SkDrawFilter::Type type) OVERRIDE;
+  virtual bool filter(SkPaint* paint, SkDrawFilter::Type type) override;
 
  private:
   int alpha_;
   bool disable_image_filtering_;
 };
 
 }  // namespace skia
 
 #endif  // SKIA_EXT_OPACITY_DRAW_FILTER_H