Bug 879431 - Set VTTCue's TextTrack from TextTrack::AddCue r=rillian
We were having an issue where the cue's track property was undefined
because it was never set when adding the cue to a text track's list
of cues.
bug 965656 - properly close() PC's when no longer used. r=jesup
Bug 986357 - Unbreak --disable-ion in non-unified mode after bug 695438. r=bhackett
Bug 990869 - Allow to enable sub Apzc for non WIN gecko clients. r=kats
Bug 991074 - Fix for "Assertion failure: JS_IsExceptionPending(cx), at ./EventListenerBinding.cpp:24". r=bz