SkDecodingImageGenerator now uses SkStreamRewindable

src/lazy/SkDiscardablePixelRef.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 "SkDiscardablePixelRef.h"
 #include "SkDiscardableMemory.h"
 
@@ skipping 52 matching lines @@
 }
 
 bool SkDiscardablePixelRef::Install(SkImageGenerator* generator,
                                     SkBitmap* dst,
                                     SkDiscardableMemory::Factory* factory) {
     SkImageInfo info;
     SkASSERT(generator != NULL);
     if ((NULL == generator)
         || (!generator->getInfo(&info))
         || (!dst->setConfig(info, 0))
-        || (0 == dst->getSize())) {  // dst->getSize=0 Probably a bad config
+        || (0 == dst->getSize())
+        || (0 == dst->rowBytes())) {
         SkDELETE(generator);
         return false;
     }
     SkAutoTUnref<SkDiscardablePixelRef> ref(SkNEW_ARGS(SkDiscardablePixelRef,
                                                    (generator, info,
                                                     dst->getSize(),
                                                     dst->rowBytes(),
                                                     factory)));
     dst->setPixelRef(ref);
     return true;
 }