extend SkBenchmark to allow a bench to return a durationScale, which allows it to perform fewer act…

bench/benchmain.cpp

 
 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #include "BenchTimer.h"
@@ skipping 897 matching lines @@
             // record timer values for each repeat, and their sum
             TimerData timerData(perIterTimeformat, normalTimeFormat);
             for (int i = 0; i < repeatDraw; i++) {
                 if ((benchMode == kRecord_benchModes || benchMode == kPictureRecord_benchModes)) {
                     // This will clear the recorded commands so that they do not
                     // accumulate.
                     canvas = pictureRecordTo.beginRecording(dim.fX, dim.fY,
                         SkPicture::kUsePathBoundsForClip_RecordingFlag);
                 }
 
-                timer->start();
+                timer->start(bench->getDurationScale());
                 if (NULL != canvas) {
                     canvas->save();
                 }
                 if (benchMode == kPictureRecord_benchModes) {
                     pictureRecordFrom.draw(canvas);
                 } else {
                     bench->draw(canvas);
                 }
 
                 if (kDeferredSilent_benchModes == benchMode) {
@@ skipping 58 matching lines @@
     }
 
     return 0;
 }
 
 #if !defined(SK_BUILD_FOR_IOS) && !defined(SK_BUILD_FOR_NACL)
 int main(int argc, char * const argv[]) {
     return tool_main(argc, (char**) argv);
 }
 #endif