The current behavior of setProperty() to not throw exceptions for invalid property names is correct as specified by CSSOM ( http://dev.w3.org/csswg/cssom/#dom-cssstyledeclaration-setproperty ), so we can remove the FIXME about throwing an exception for that case.
Created attachment 116225 [details] Patch
Comment on attachment 116225 [details] Patch If you really want you could even add a test to be sure we do not throw an exception when we set a invalid property :-)
Comment on attachment 116225 [details] Patch Clearing flags on attachment: 116225 Committed r101007: <http://trac.webkit.org/changeset/101007>
All reviewed patches have been landed. Closing bug.