Make ImageDecoder::setSize non-virtual

Source/core/platform/image-decoders/ImageDecoder.h

 /*
  * Copyright (C) 2006 Apple Computer, Inc.  All rights reserved.
  * Copyright (C) Research In Motion Limited 2009-2010. 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 237 matching lines @@
         // sizes.  This does NOT differ from size() for GIF, since decoding GIFs
         // composites any smaller frames against previous frames to create full-
         // size frames.
         virtual IntSize frameSizeAtIndex(size_t) const
         {
             return size();
         }
 
         // Returns whether the size is legal (i.e. not going to result in
         // overflow elsewhere).  If not, marks decoding as failed.
-        virtual bool setSize(unsigned width, unsigned height)
+        bool setSize(unsigned width, unsigned height)
         {
             if (isOverSize(width, height))
                 return setFailed();
             m_size = IntSize(width, height);
             m_sizeAvailable = true;
             return true;
         }
 
         // Lazily-decodes enough of the image to get the frame count (if
         // possible), without decoding the individual frames.
@@ skipping 127 matching lines @@
 
         IntSize m_size;
         bool m_sizeAvailable;
         bool m_isAllDataReceived;
         bool m_failed;
     };
 
 } // namespace WebCore
 
 #endif