Align CSSSupportsRule with the specification: - https://drafts.csswg.org/css-conditional-3/#csssupportsrule In particular: - The parameters to insertRule() / deleteRule() should be mandatory - CSSSupportsRule should be exposed on the global Window object Both Firefox and Chrome agree with the specification here.
Created attachment 284707 [details] Patch
Committed r203782: <http://trac.webkit.org/changeset/203782>