GitLab

Only start sending IceCandidates after we exchanged the offer and answer
messages. This allows us to reject incoming IceCandidate messages for
already closed connections if they arrive after the connection has been
closed.

Bug: 1050041
Change-Id: I6f332ee44b43551d2fabc8633b3571fe3bae76db
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2013127
Commit-Queue: Richard Knoll <knollr@chromium.org>
Reviewed-by: Himanshu Jaju <himanshujaju@chromium.org>
Cr-Commit-Position: refs/heads/master@{#739464}