Bug 897108 - test_playback_rate_playpause.html: set preload to 'metadata' to ensure 'loadedmetadata' is fired. r=cpearce
Bug 1020538 - Fix the position calculation algorithm in MediaDecoderStateMachine::GetVideoStreamPosition().  r=cpearce
Bug 1020538 - Fix frame position adjustment algorithm in AudioStream.  r=kinetik
Bug 1020538 - Enable test_playback_rate.html.  r=cpearce