Refactor SkBitmapRegionDecoderInterface for Android

bench/BitmapRegionDecoderBench.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "BitmapRegionDecoderBench.h"
 #include "CodecBenchPriv.h"
 #include "SkBitmap.h"
@@ skipping 43 matching lines @@
 
 bool BitmapRegionDecoderBench::isSuitableFor(Backend backend) {
     return kNonRendering_Backend == backend;
 }
 
 void BitmapRegionDecoderBench::onDelayedSetup() {
     fBRD.reset(SkBitmapRegionDecoderInterface::CreateBitmapRegionDecoder(fData, fStrategy));
 }
 
 void BitmapRegionDecoderBench::onDraw(int n, SkCanvas* canvas) {
-    SkAutoTDelete<SkBitmap> bitmap;
     for (int i = 0; i < n; i++) {
-        bitmap.reset(fBRD->decodeRegion(fSubset.left(), fSubset.top(), fSubset.width(),
-                fSubset.height(), fSampleSize, fColorType));
-        SkASSERT(nullptr != bitmap.get());
+        SkBitmap bm;
+        SkAssertResult(fBRD->decodeRegion(&bm, nullptr, fSubset, fSampleSize, fColorType, false));
     }
 }