The summary says it all: when enabling SVG animations, WebCore/svg/SVGAnimateMotionElement.cpp fails to build when SVG foreign objects are not enabled.
Created attachment 20369 [details] patch
Comment on attachment 20369 [details] patch You should use #if ENABLE(SVG_FOREIGN_OBJECT) instead, and provide a ChangeLog.
Final patch: http://paste.lisp.org/display/59101 Landed as r31856