<rdar://problem/5224749> Show a zoom/unzoom cursor for resizable image documents
        
        * WebCore.xcodeproj/project.pbxproj:
        Install the zoom cursors.
        
        * loader/ImageDocument.cpp:
        (WebCore::ImageDocument::resizeImageToFit):
        Set the cursor to the zoom in cursor.
        
        (WebCore::ImageDocument::restoreImageSize):
        If the image fits, reset the cursor. Otherwise, set it to the zoom in cursor.



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@21689 268f45cc-cd09-0410-ab3c-d52691b4dbfc