Reland: Improve testing of SRTP external auth code paths.

Reland: Improve testing of SRTP external auth code paths.

This CL is a reland of https://codereview.webrtc.org/2722423003 which got
reverted due to compile errors when rolling into Chromium.

Original CL description:

Improve testing of SRTP external auth code paths.

Previously code behind ENABLE_EXTERNAL_AUTH was only compiled with Chromium
but developed in WebRTC, which made testing rather complicated. This caused
some trouble in the past (e.g. https://crbug.com/628400#c1)

This CL helps in that the external auth code is now compiled with WebRTC
and the srtpfilter integration gets tested.

BUG=chromium:628400
Review-Url: https://codereview.webrtc.org/2735613002
Cr-Commit-Position: refs/heads/master@{#17052}
Committed: https://chromium.googlesource.com/external/webrtc/+/dfcab728b21cec2994131a449c6c1e38018c264a

[joachim, 2017-03-05 11:07:23]

jbauch@webrtc.org changed reviewers:
+ deadbeef@webrtc.org

[joachim, 2017-03-05 11:07:24]

Ptal

[Taylor Brandstetter, 2017-03-06 00:05:33]

lgtm

[joachim, 2017-03-06 07:51:13]

The CQ bit was checked by jbauch@webrtc.org

[commit-bot: I haz the power, 2017-03-06 07:51:20]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.webrtc.org/...

[commit-bot: I haz the power, 2017-03-06 08:14:11]

CQ is committing da patch.

Bot data: {"patchset_id": 20001, "attempt_start_ts": 1488786673760610,
"parent_rev": "156e3afa7f945069b206c3e252ea3609869bfad5", "commit_rev":
"dfcab728b21cec2994131a449c6c1e38018c264a"}

[commit-bot: I haz the power, 2017-03-06 08:14:13]

Description was changed from

==========
Reland: Improve testing of SRTP external auth code paths.

This CL is a reland of https://codereview.webrtc.org/2722423003 which got
reverted due to compile errors when rolling into Chromium.

Original CL description:

Improve testing of SRTP external auth code paths.

Previously code behind ENABLE_EXTERNAL_AUTH was only compiled with Chromium
but developed in WebRTC, which made testing rather complicated. This caused
some trouble in the past (e.g. https://crbug.com/628400#c1)

This CL helps in that the external auth code is now compiled with WebRTC
and the srtpfilter integration gets tested.

BUG=chromium:628400
==========

to

==========
Reland: Improve testing of SRTP external auth code paths.

This CL is a reland of https://codereview.webrtc.org/2722423003 which got
reverted due to compile errors when rolling into Chromium.

Original CL description:

Improve testing of SRTP external auth code paths.

Previously code behind ENABLE_EXTERNAL_AUTH was only compiled with Chromium
but developed in WebRTC, which made testing rather complicated. This caused
some trouble in the past (e.g. https://crbug.com/628400#c1)

This CL helps in that the external auth code is now compiled with WebRTC
and the srtpfilter integration gets tested.

BUG=chromium:628400

Review-Url: https://codereview.webrtc.org/2735613002
Cr-Commit-Position: refs/heads/master@{#17052}
Committed:
https://chromium.googlesource.com/external/webrtc/+/dfcab728b21cec2994131a449...
==========

[commit-bot: I haz the power, 2017-03-06 08:14:14]

Committed patchset #2 (id:20001) as
https://chromium.googlesource.com/external/webrtc/+/dfcab728b21cec2994131a449...