WebKit enqueuePageshowEvent / enqueuePopstateEvent Universal XSS

WebKit: UXSS: enqueuePageshowEvent and enqueuePopstateEvent don't enqueue, but dispatch CVE-2017-2510 Here is a snippet of CachedFrameBase::restore which is invoked when cached frames are restored. void CachedFrameBase::restore ... for auto& childFrame : mchildFrames...