Major bench refactoring.

bench/MergeBench.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 "SkBenchmark.h"
 #include "SkBitmapDevice.h"
 #include "SkBitmapSource.h"
 #include "SkCanvas.h"
@@ skipping 20 matching lines @@
             make_checkerboard();
             fInitialized = true;
         }
     }
 
     virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
         SkRect r = fIsSmall ? SkRect::MakeWH(FILTER_WIDTH_SMALL, FILTER_HEIGHT_SMALL) :
                               SkRect::MakeWH(FILTER_WIDTH_LARGE, FILTER_HEIGHT_LARGE);
         SkPaint paint;
         paint.setImageFilter(mergeBitmaps())->unref();
-        canvas->drawRect(r, paint);
+        for (int i = 0; i < this->getLoops(); i++) {
+            canvas->drawRect(r, paint);
+        }
     }
 
 private:
     SkImageFilter* mergeBitmaps() {
         SkImageFilter* first = new SkBitmapSource(fCheckerboard);
         SkImageFilter* second = new SkBitmapSource(fBitmap);
         SkAutoUnref aur0(first);
         SkAutoUnref aur1(second);
         return new SkMergeImageFilter(first, second);
     }
@@ skipping 39 matching lines @@
     bool fInitialized;
     SkBitmap fBitmap, fCheckerboard;
 
     typedef SkBenchmark INHERITED;
 };
 
 ///////////////////////////////////////////////////////////////////////////////
 
 DEF_BENCH( return new MergeBench(p, true); )
 DEF_BENCH( return new MergeBench(p, false); )