ffc61181d8
A WebRtcVideoEngine2 object seems to be reused between PeerConnections, which means that the field trial added in https://codereview.webrtc.org/2511703002/ may not activate/deactivate as intended between calls. This CL removes the caching of video codecs, which gets rid of this problem. BUG=webrtc:5654 Review-Url: https://codereview.webrtc.org/2521393004 Cr-Commit-Position: refs/heads/master@{#15265}