bda7e0b932
If a description is set that requires making a default stream, and one already exists, we'll now keep the existing default audio/video tracks, rather than destroying them and recreating them. Destroying them caused the blink MediaStream to go to an "ended" state, which is the root cause of the bug. BUG=webrtc:5250 Review URL: https://codereview.webrtc.org/1469833006 Cr-Commit-Position: refs/heads/master@{#10946}