TransformOperation subclasses are being serialized using SimpleArgumentCoder. However, SimpleArgumentCoder uses memcpy to decode the data, so the objects serialized by it needs to be a POD(Plain Old Data) type and TransformOperation subclasses are not because the base class has pure virtual methods.
Created attachment 115612 [details] Patch Proposed patch.
Comment on attachment 115612 [details] Patch Clearing flags on attachment: 115612 Committed r100680: <http://trac.webkit.org/changeset/100680>
All reviewed patches have been landed. Closing bug.