For large animated GIFs, destroy and recreate the source for every animation frame.  This keeps
        the memory consumption down while giant images are animating.

        Reviewed by andersca

        * platform/graphics/BitmapImage.cpp:
        (WebCore::BitmapImage::BitmapImage):
        (WebCore::BitmapImage::destroyDecodedData):
        (WebCore::BitmapImage::dataChanged):
        (WebCore::BitmapImage::advanceAnimation):
        * platform/graphics/BitmapImage.h:



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@20184 268f45cc-cd09-0410-ab3c-d52691b4dbfc