Make sure SkDrawLooper objects can only be allocated on the heap.

bench/BlurRoundRectBench.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 "SkBlurMask.h"
 #include "SkBlurMaskFilter.h"
@@ skipping 22 matching lines @@
     virtual const char* onGetName() SK_OVERRIDE {
         return fName.c_str();
     }
 
     virtual SkIPoint onGetSize() SK_OVERRIDE {
         return SkIPoint::Make(SkScalarCeilToInt(fRRect.rect().width()),
                               SkScalarCeilToInt(fRRect.rect().height()));
     }
 
     virtual void onDraw(const int loops, SkCanvas* canvas) SK_OVERRIDE {
-        SkLayerDrawLooper* looper = new SkLayerDrawLooper;
+        SkLayerDrawLooper::Builder looperBuilder;
         {
             SkLayerDrawLooper::LayerInfo info;
             info.fPaintBits = SkLayerDrawLooper::kMaskFilter_Bit
                               | SkLayerDrawLooper::kColorFilter_Bit;
             info.fColorMode = SkXfermode::kSrc_Mode;
             info.fOffset = SkPoint::Make(SkIntToScalar(-1), SkIntToScalar(0));
             info.fPostTranslate = false;
-            SkPaint* paint = looper->addLayerOnTop(info);
+            SkPaint* paint = looperBuilder.addLayerOnTop(info);
             SkMaskFilter* maskFilter = SkBlurMaskFilter::Create(
                     SkBlurMaskFilter::kNormal_BlurStyle,
                     SkBlurMask::ConvertRadiusToSigma(SK_ScalarHalf),
                     SkBlurMaskFilter::kHighQuality_BlurFlag);
             paint->setMaskFilter(maskFilter)->unref();
             SkColorFilter* colorFilter = SkColorFilter::CreateModeFilter(SK_ColorLTGRAY,
                     SkXfermode::kSrcIn_Mode);
             paint->setColorFilter(colorFilter)->unref();
             paint->setColor(SK_ColorGRAY);
         }
         {
             SkLayerDrawLooper::LayerInfo info;
-            looper->addLayerOnTop(info);
+            looperBuilder.addLayerOnTop(info);
         }
         SkPaint dullPaint;
         dullPaint.setAntiAlias(true);
 
         SkPaint loopedPaint;
-        loopedPaint.setLooper(looper)->unref();
+        loopedPaint.setLooper(looperBuilder.detachLooper())->unref();
         loopedPaint.setAntiAlias(true);
         loopedPaint.setColor(SK_ColorCYAN);
 
         for (int i = 0; i < loops; i++) {
             canvas->drawRect(fRRect.rect(), dullPaint);
             canvas->drawRRect(fRRect, loopedPaint);
         }
     }
 
 private:
     SkString    fName;
     SkRRect     fRRect;
 
     typedef     SkBenchmark INHERITED;
 };
 
 // Create one with dimensions/rounded corners based on the skp
 DEF_BENCH(return new BlurRoundRectBench(600, 5514, 6);)
 // Same radii, much smaller rectangle
 DEF_BENCH(return new BlurRoundRectBench(100, 100, 6);)
 // Other radii options
 DEF_BENCH(return new BlurRoundRectBench(100, 100, 30);)
 DEF_BENCH(return new BlurRoundRectBench(100, 100, 90);)