Fixed bad bitmap size crashes

src/core/SkPixelRef.cpp

 
 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #include "SkPixelRef.h"
 #include "SkFlattenableBuffers.h"
 #include "SkThread.h"
@@ skipping 229 matching lines @@
 }
 
 bool SkPixelRef::onReadPixels(SkBitmap* dst, const SkIRect* subset) {
     return false;
 }
 
 SkData* SkPixelRef::onRefEncodedData() {
     return NULL;
 }
 
+size_t SkPixelRef::getSize() const {
+    return 0;
+}
+
 ///////////////////////////////////////////////////////////////////////////////
 
 #ifdef SK_BUILD_FOR_ANDROID
 void SkPixelRef::globalRef(void* data) {
     this->ref();
 }
 
 void SkPixelRef::globalUnref() {
     this->unref();
 }
 #endif