add rowbytes option to allocPixels

src/lazy/SkCachingPixelRef.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 "SkCachingPixelRef.h"
 #include "SkScaledImageCache.h"
 
@@ skipping 36 matching lines @@
 
     const SkImageInfo& info = this->info();
     SkBitmap bitmap;
     SkASSERT(NULL == fScaledCacheId);
     fScaledCacheId = SkScaledImageCache::FindAndLock(this->getGenerationID(),
                                                      info.fWidth,
                                                      info.fHeight,
                                                      &bitmap);
     if (NULL == fScaledCacheId) {
         // Cache has been purged, must re-decode.
-        if ((!bitmap.setInfo(info, fRowBytes)) || !bitmap.allocPixels()) {
+        if (!bitmap.allocPixels(info, fRowBytes)) {
             fErrorInDecoding = true;
             return false;
         }
         SkAutoLockPixels autoLockPixels(bitmap);
         if (!fImageGenerator->getPixels(info, bitmap.getPixels(), fRowBytes)) {
             fErrorInDecoding = true;
             return false;
         }
         fScaledCacheId = SkScaledImageCache::AddAndLock(this->getGenerationID(),
                                                         info.fWidth,
@@ skipping 20 matching lines @@
     rec->fColorTable = NULL;
     rec->fRowBytes = bitmap.rowBytes();
     return true;
 }
 
 void SkCachingPixelRef::onUnlockPixels() {
     SkASSERT(fScaledCacheId != NULL);
     SkScaledImageCache::Unlock( static_cast<SkScaledImageCache::ID*>(fScaledCacheId));
     fScaledCacheId = NULL;
 }