Roll WebRTC 18172:18189 (12 commits)

Roll WebRTC 18172:18189 (12 commits)

Changes: https://chromium.googlesource.com/external/webrtc/trunk/webrtc.git/+log/92b90e4..297bd8c

$ git log 92b90e4..297bd8c --date=short --no-merges --format=%ad %ae %s
2017-05-17 jbauch@webrtc.org Add methods to change enabled events in PhysicalSocket.
2017-05-17 jtteh@webrtc.org Updated comments for unit tests to validate iOS audio session isInterrupted flag does not get reset correctly.
2017-05-17 zstein@webrtc.org Simple tests for Call::SetBitrateConfig.
2017-05-17 kjellander@webrtc.org Remove gflags dependency for screenshare_loopback
2017-05-17 ivoc@webrtc.org Add log message to help analyze why echo likelihood > 1.1
2017-05-17 erikvarga@webrtc.org Don't add FEC and RTX overheads when calculating a padding packet's maximum payload size.
2017-05-17 kthelgason@webrtc.org Revert of Split iOS sdk in to separate targets (patchset #1 id:1 of https://codereview.webrtc.org/2890733003/ )
2017-05-17 ehmaldonado@webrtc.org Revert of Reduce dependencies on rtc::FileSystem in FileRotatingStream tests, adding helpers in webrtc::test:: (patchset #7 id:120001 of https://codereview.webrtc.org/2872283002/ )
2017-05-17 erikvarga@webrtc.org Remove hardcoded kValueSizeBytes values from variable-length header extensions.
2017-05-17 ossu@webrtc.org Remove temporary include of builtin_audio_encoder_factory.h.
2017-05-17 kthelgason@webrtc.org Reland of Split iOS sdk in to separate targets (patchset #1 id:1 of https://codereview.webrtc.org/2890513002/ )
2017-05-17 nisse@webrtc.org Reduce dependencies on rtc::FileSystem in FileRotatingStream tests.

TBR=
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_chromium_archive_rel_ng;master.tryserver.chromium.mac:mac_chromium_archive_rel_ng
BUG=

[henrika (OOO until Aug 14), 2017-05-18 07:57:48]

The CQ bit was checked by henrika@chromium.org

[commit-bot: I haz the power, 2017-05-18 07:58:31]

CQ is trying da patch.

Follow status at:
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-05-18 09:05:55]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2017-05-18 09:05:56]

Try jobs failed on following builders:
  win_chromium_x64_rel_ng on master.tryserver.chromium.win (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_x64_...)

[henrika (OOO until Aug 14), 2017-05-18 10:13:13]

The CQ bit was checked by henrika@chromium.org

[commit-bot: I haz the power, 2017-05-18 10:13:40]

CQ is trying da patch.

Follow status at:
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-05-18 12:32:45]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2017-05-18 12:32:46]

Try jobs failed on following builders:
  win_chromium_x64_rel_ng on master.tryserver.chromium.win (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_x64_...)

[henrika (OOO until Aug 14), 2017-05-18 12:34:29]

The CQ bit was checked by henrika@chromium.org

[commit-bot: I haz the power, 2017-05-18 12:34:58]

CQ is trying da patch.

Follow status at:
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[henrika (OOO until Aug 14), 2017-05-18 14:53:06]

The CQ bit was unchecked by henrika@chromium.org