Add subsetting to SkScaledCodec

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 12 matching lines @@
 {
     // Choose a useful name for the region decoding strategy
     const char* strategyName;
     switch (strategy) {
         case SkBitmapRegionDecoderInterface::kOriginal_Strategy:
             strategyName = "Original";
             break;
         case SkBitmapRegionDecoderInterface::kCanvas_Strategy:
             strategyName = "Canvas";
             break;
+        case SkBitmapRegionDecoderInterface::kCodec_Strategy:
+            strategyName = "Codec";
+            break;
         default:
             SkASSERT(false);
             strategyName = "";
             break;
     }
 
     // Choose a useful name for the color type
     const char* colorName = color_type_to_str(colorType);
 
     fName.printf("BRD_%s_%s_%s", baseName, strategyName, colorName);
@@ skipping 16 matching lines @@
 }
 
 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());
     }
 }