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

bench/BitmapScaleBench.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "Benchmark.h"
 #include "SkBlurMask.h"
 #include "SkCanvas.h"
@@ skipping 70 matching lines @@
 private:
     typedef Benchmark INHERITED;
 };
 
 class BitmapFilterScaleBench: public BitmapScaleBench {
  public:
     BitmapFilterScaleBench( int is, int os) : INHERITED(is, os) {
         setName( "filter" );
     }
 protected:
-    virtual void doScaleImage() SK_OVERRIDE {
+    void doScaleImage() SK_OVERRIDE {
         SkCanvas canvas( fOutputBitmap );
         SkPaint paint;
 
         paint.setFilterLevel(SkPaint::kHigh_FilterLevel);
         fInputBitmap.notifyPixelsChanged();
         canvas.concat(fMatrix);
         canvas.drawBitmap(fInputBitmap, 0, 0, &paint );
     }
 private:
     typedef BitmapScaleBench INHERITED;
 };
 
 DEF_BENCH(return new BitmapFilterScaleBench(10, 90);)
 DEF_BENCH(return new BitmapFilterScaleBench(30, 90);)
 DEF_BENCH(return new BitmapFilterScaleBench(80, 90);)
 DEF_BENCH(return new BitmapFilterScaleBench(90, 90);)
 DEF_BENCH(return new BitmapFilterScaleBench(90, 80);)
 DEF_BENCH(return new BitmapFilterScaleBench(90, 30);)
 DEF_BENCH(return new BitmapFilterScaleBench(90, 10);)
 DEF_BENCH(return new BitmapFilterScaleBench(256, 64);)
 DEF_BENCH(return new BitmapFilterScaleBench(64, 256);)