Add MultiPictureDraw to nanobench

bench/Benchmark.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 "Benchmark.h"
 
 #include "SkCanvas.h"
@@ skipping 19 matching lines @@
 }
 
 SkIPoint Benchmark::getSize() {
     return this->onGetSize();
 }
 
 void Benchmark::preDraw() {
     this->onPreDraw();
 }
 
+void Benchmark::perCanvasPreDraw(SkCanvas* canvas) {
+    this->onPerCanvasPreDraw(canvas);
+}
+
+void Benchmark::perCanvasPostDraw(SkCanvas* canvas) {
+    this->onPerCanvasPostDraw(canvas);
+}
+
 void Benchmark::draw(const int loops, SkCanvas* canvas) {
     SkAutoCanvasRestore ar(canvas, true/*save now*/);
     this->onDraw(loops, canvas);
 }
 
 void Benchmark::setupPaint(SkPaint* paint) {
     paint->setAlpha(fForceAlpha);
     paint->setAntiAlias(true);
     paint->setFilterLevel(SkPaint::kNone_FilterLevel);
 
     paint->setFlags((paint->getFlags() & ~fClearMask) | fOrMask);
 
     if (SkTriState::kDefault != fDither) {
         paint->setDither(SkTriState::kTrue == fDither);
     }
 }
 
 SkIPoint Benchmark::onGetSize() {
     return SkIPoint::Make(640, 480);
 }