Taylor Brandstetter f475d365a2 Properly handle different transports having different SSL roles.
This meant splitting "transport_options" into audio/video/data options,
for when creating the answer, and giving "GetSslRole" a "transport_name"
parameter so we can retrieve the current role on a per-transport basis.

BUG=webrtc:4525
R=pthatcher@webrtc.org

Review URL: https://codereview.webrtc.org/1516993002 .

Cr-Commit-Position: refs/heads/master@{#11192}
2016-01-08 23:36:06 +00:00
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