Using calc() for -webkit-filter does not work because the CSS parser does not handle it properly.
Created attachment 244019 [details] Patch
Comment on attachment 244019 [details] Patch View in context: https://bugs.webkit.org/attachment.cgi?id=244019&action=review > Source/WebCore/css/CSSParser.cpp:9358 > + Ref<CSSPrimitiveValue> primitiveValue = createPrimitiveNumericValue(argumentWithCalculation); I like auto for this sort of thing.
Created attachment 244033 [details] Patch
Comment on attachment 244033 [details] Patch Clearing flags on attachment: 244033 Committed r177950: <http://trac.webkit.org/changeset/177950>
All reviewed patches have been landed. Closing bug.