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I originally fixed these as part of a different CL but that change
turned out to be unnecessary due to my change last week to cleanly close
the PeerConnection.  So here is a super-minor clean-up CL that fixes
some comments.

Change-Id: I588239e74f341d87a2468d7d47eccb00161fb5b0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2208091
Commit-Queue: Joe Downing <joedow@chromium.org>
Auto-Submit: Joe Downing <joedow@chromium.org>
Reviewed-by: Jamie Walch <jamiewalch@chromium.org>
Cr-Commit-Position: refs/heads/master@{#769970}