This simplifies the code and ensures we don't starve the decoder if there are multiple output buffers queued. Bug: webrtc:7760 Change-Id: I42c31f5045fca96847001260b8796d6756900d0f Reviewed-on: https://webrtc-review.googlesource.com/5522 Commit-Queue: Sami Kalliomäki <sakal@webrtc.org> Reviewed-by: Magnus Jedvert <magjed@webrtc.org> Cr-Commit-Position: refs/heads/master@{#20161}