This should also cover ScriptExecutionContext::reportException.
Created attachment 199610 [details]
[PATCH] Proposed Fix
Likely requires a patch on another bug and needs to be rebased in order to build. I'll work on making that happen so the bots can build as expected. The change however would remain essentially the same.
Landed r149131: <http://trac.webkit.org/changeset/149131>