deadbeef d45aea8f42 Serialize "a=x-google-flag:conference".
There was a test for deserialization but not serialization. This was
probably always broken and no one noticed. I only noticed while
debugging something else.

BUG=None
TBR=pthatcher@webrtc.org

Review-Url: https://codereview.webrtc.org/3012383002
Cr-Commit-Position: refs/heads/master@{#19875}
2017-09-16 08:24:29 +00:00
..
2017-09-15 04:25:06 +00:00