m_windowShell should be owned by ScriptController. After this change, I can move a bunch of V8Proxy methods that access windowShell() from V8Proxy to ScriptController.
Created attachment 159316 [details] Patch
Comment on attachment 159316 [details] Patch I thought I tried this before and there was some complication, but perhaps that complication has been removed. This patch certainly look straightforward and correct. Note: We eventually want ScriptController to hold a map from DOMWrapperWorld to V8WindowShell, but that's a separate effort.
@dcarney: Related to your work with making a WindowShell per DOMWrapperWorld.
Comment on attachment 159316 [details] Patch Clearing flags on attachment: 159316 Committed r125993: <http://trac.webkit.org/changeset/125993>
All reviewed patches have been landed. Closing bug.