philipel c9b27d56c0 Bugfix for Vp9 GOF and missing frames.
In order to correctly determine the references of a frame when using Vp9
with GOF one has to wait for all frames on the lower temporal layers
to make sure no up-switch point is missed.

This patch fix a bug where upon receiving a frame the RtpFrameReferenceFinder
would try to add missing frame for a group with a not yet knows scalability
structure.

BUG=webrtc:5514

Review-Url: https://codereview.webrtc.org/2127073002
Cr-Commit-Position: refs/heads/master@{#13487}
2016-07-15 13:50:34 +00:00
..
2016-06-16 13:51:40 +00:00