Generate toCSSFooValue() for CSSFilterImageValue and CSSInitialValue, and use it. This type cast function will help to detect bad-casts.
Created attachment 212890 [details] Patch
Comment on attachment 212890 [details] Patch Clearing flags on attachment: 212890 Committed r156628: <http://trac.webkit.org/changeset/156628>
All reviewed patches have been landed. Closing bug.