Bug 936784 - Don't overbuffer in the MSG on AudioContext shutdown and only mute on Shutdown if the AudioContext is not an OfflineAudioContext. r=roc, r=ehsan, a=bajaj
Bug 952235 - Handle device offset when applying pattern transform. r=bas, a=bajaj
Bug 945645 - Only init WMF video decoding if we have a video container. r=padenot, a=bajaj
Bug 957021 - Fix messed-up memory reporter paths. r=khuey, a=bajaj
Bug 956201 - Null check the destination node when muting. r=karlt, a=bajaj

This can happen since we now mute instead of suspending when an AudioContext
shuts down.