Modernize CrossOriginPreflightResultCache
Created attachment 223340 [details] Patch
Committed r163545: <http://trac.webkit.org/changeset/163545>
This broke Windows build: http://build.webkit.org/builders/Apple%20Win%20Release%20%28Build%29/builds/57537/steps/compile-webkit/logs/stdio EWS bubble turned red two minutes before the patch was landed.