Fix up all the easy virtual ... SK_OVERRIDE cases.

include/core/SkBBHFactory.h

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkBBHFactory_DEFINED
 #define SkBBHFactory_DEFINED
 
 #include "SkSize.h"
 #include "SkRect.h"
 
 class SkBBoxHierarchy;
 
 class SK_API SkBBHFactory {
 public:
     /**
      *  Allocate a new SkBBoxHierarchy. Return NULL on failure.
      */
     virtual SkBBoxHierarchy* operator()(const SkRect& bounds) const = 0;
     virtual ~SkBBHFactory() {};
 };
 
 class SK_API SkRTreeFactory : public SkBBHFactory {
 public:
-    virtual SkBBoxHierarchy* operator()(const SkRect& bounds) const SK_OVERRIDE;
+    SkBBoxHierarchy* operator()(const SkRect& bounds) const SK_OVERRIDE;
 private:
     typedef SkBBHFactory INHERITED;
 };
 
 // TODO(mtklein): delete entirely when Chromium's clean for TileGridInfo
 class SK_API SkTileGridFactory {
 public:
     struct TileGridInfo {
         /** Tile placement interval */
         SkISize  fTileInterval;
 
         /** Pixel coverage overlap between adjacent tiles */
         SkISize  fMargin;
 
         /** Offset added to device-space bounding box positions to convert
           * them to tile-grid space. This can be used to adjust the "phase"
           * of the tile grid to match probable query rectangles that will be
           * used to search into the tile grid. As long as the offset is smaller
           * or equal to the margin, there is no need to extend the domain of
           * the tile grid to prevent data loss.
           */
         SkIPoint fOffset;
     };
 };
 
 #endif