Bug 991533 - Limit AudioBuffer channel counts and sample rate range. r=padenot, r=ehsan, r=bz, a=1.2.x+
Bug 1005552 - Stop binding marquee event handlers. r=bz, a=1.2.x+

These functions get invoked as event listeners, so we'll automatically get the
proper |this|. The reason for the existing shenanigans was to work around
bug 872772, which has now been fixed.