Adding null pointer check to Image::isTextureBacked()

third_party/WebKit/Source/platform/graphics/Image.cpp

 /*
  * Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
  * Copyright (C) 2004, 2005, 2006 Apple Computer, Inc.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 257 matching lines @@
 
 PassRefPtr<Image> Image::imageForDefaultFrame()
 {
     RefPtr<Image> image(this);
 
     return image.release();
 }
 
 bool Image::isTextureBacked()
 {
-    return imageForCurrentFrame()->isTextureBacked();
+    RefPtr<SkImage> image = imageForCurrentFrame();
+    return image ? image->isTextureBacked() : false;
 }
 
 } // namespace blink