Bug 836076 - Part 4: Move AudioEventTimeline::Event outside of AudioEventTimeline to be able to specialize its template members; r=roc
Bug 836076 - Part 5: Provide an API for converting event times to tick values; r=roc
Bug 836076 - Part 6: Hook up GainNode to the MediaStreams back-end to enable controlling the volume of the audio being played back; r=roc