The objective is to pass an Isolate everywhere. Given that a callback from WebCore is an entry point to V8, we can call Isolate::GetCurrent() at the head of the callback and pass it to other places. (In practice, handleEvent() is the only callback used in the current WebKit.)
Created attachment 182531 [details]
Comment on attachment 182531 [details]
Clearing flags on attachment: 182531
Committed r139599: <http://trac.webkit.org/changeset/139599>
All reviewed patches have been landed. Closing bug.