Accept remote offers with current DTLS role, rather than "actpass".
JSEP implementations are required to always generate offers with
"actpass", but remote endpoints are not. So we should accept remote
offers with the current negotiated DTLS role.
This was recently clarified in dtls-sdp; it was somewhat ambiguous
before.
Also doing a bit of refactoring of JsepTransport (making a method
private that should have been private, fixing unit tests that were
directly calling said method).
BUG=webrtc:7072
Review-Url: https://codereview.webrtc.org/2770903003
Cr-Original-Commit-Position: refs/heads/master@{#17396}
Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: d8cfa1af389d815f6dd1681fcf7f168fc5e61818
6 files changed
