Bug 844792 - Warn about the upcoming removal of multipart support in XHR. r=smaug.
Bug 836655 - [Audio] To remove ChildID if there is no content channel playing in foreground. And only send audio-channel-changed with normal when ChildID in the background has content channel in playing state. r=baku
Bug 836655 - Modify unit test for adapting change in this bug. r=baku