The ResourceContentView type changing handling was moved to ResourceClusterContentView a while ago. In the process some code was leftover in ResourceContentView which can be removed: this._resource.removeEventListener(WebInspector.Resource.Event.TypeDidChange, this._resourceTypeDidChange, this); ResourceContentView no longer adds that event listener to the resource, and doesn't have a this._resourceTypeDidChange function, so it is likely passing null and not removing anything.
<rdar://problem/14664197>
Created attachment 208215 [details] [PATCH] Proposed Fix
Comment on attachment 208215 [details] [PATCH] Proposed Fix Clearing flags on attachment: 208215 Committed r153765: <http://trac.webkit.org/changeset/153765>
All reviewed patches have been landed. Closing bug.