The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/b7cdd8383c1c3f2f8c0b59d07068c543a2e24e79

commit b7cdd8383c1c3f2f8c0b59d07068c543a2e24e79
Author: Carlos Knippschild <carlosk@chromium.org>
Date: Tue Nov 21 00:26:50 2017

Revert "Roll src/third_party/webrtc/ 2707fb278..202be3957 (64 commits)"

This reverts commit 0366f1a82a0d2c4e0b82a3632e1dff5ee0b35690.

Reason for revert: broke WinMSVC64 (dbg) build bot. Culprit CL seems to be: https://webrtc-review.googlesource.com/c/src/+/21162

Original change's description:
> Roll src/third_party/webrtc/ 2707fb278..202be3957 (64 commits)
> 
> https://webrtc.googlesource.com/src.git/+log/2707fb2782e7..202be3957d95
> 
> $ git log 2707fb278..202be3957 --date=short --no-merges --format='%ad %ae %s'
> 
> Created with:
>   roll-dep src/third_party/webrtc
> BUG=None,None,None,None,None,None,None,None,None,None,None,None,None,None,None,None,None,None,None,None,None,None,None,None,None,None,None,None,None,None,None,None,None,None,None,None,None,None,None,None,None,None
> 
> 
> The AutoRoll server is located here: https://webrtc-chromium-roll.skia.org
> 
> Documentation for the AutoRoller is here:
> https://skia.googlesource.com/buildbot/+/master/autoroll/README.md
> 
> If the roll is causing failures, please contact the current sheriff, who should
> be CC'd on the roll, and stop the roller if necessary.
> 
> 
> CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_chromium_archive_rel_ng;master.tryserver.chromium.mac:mac_chromium_archive_rel_ng
> TBR=webrtc-chromium-sheriffs-robots@google.com
> 
> Change-Id: I357c178ad4b6243456231ccf01f9f965d3962a21
> Reviewed-on: https://chromium-review.googlesource.com/779310
> Reviewed-by: WebRTC Roll Bot <webrtc-autoroll@chromium.org>
> Commit-Queue: WebRTC Roll Bot <webrtc-autoroll@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#517979}

TBR=webrtc-autoroll@chromium.org,webrtc-chromium-sheriffs-robots@google.com

Change-Id: I706ac70581246daee3626ee31734490eb5c92d2f
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug:  787192 
Cq-Include-Trybots: master.tryserver.chromium.linux:linux_chromium_archive_rel_ng;master.tryserver.chromium.mac:mac_chromium_archive_rel_ng
Reviewed-on: https://chromium-review.googlesource.com/780263
Reviewed-by: Carlos Knippschild <carlosk@chromium.org>
Commit-Queue: Carlos Knippschild <carlosk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#518006}
[modify] https://crrev.com/b7cdd8383c1c3f2f8c0b59d07068c543a2e24e79/DEPS

It was caused by a bad roll from webrtc: https://chromium-review.googlesource.com/c/chromium/src/+/779310

Reverted here: https://chromium-review.googlesource.com/c/chromium/src/+/780263

Potential culprit CL: https://webrtc-review.googlesource.com/c/src/+/21162

CC-ing owner and reviewers from WebRTC related change.

First failing build was #213 with this compile error:

FAILED: obj/third_party/webrtc/media/rtc_audio_video/convert_legacy_video_factory.obj 
ninja -t msvc -e environment.x64 -- C:\b\c\goma_client/gomacc.exe "c:\b\c\win_toolchain\vs_files\a9e1098bba66d2acccc377d5ee81265910f29272\vc\tools\msvc\14.11.25503\bin\hostx64\x64/cl.exe" /nologo /showIncludes  @obj/third_party/webrtc/media/rtc_audio_video/convert_legacy_video_factory.obj.rsp /c ../../third_party/webrtc/media/engine/convert_legacy_video_factory.cc /Foobj/third_party/webrtc/media/rtc_audio_video/convert_legacy_video_factory.obj /Fd"obj/third_party/webrtc/media/rtc_audio_video_cc.pdb"
c:\b\c\b\win\src\third_party\webrtc\media\engine\convert_legacy_video_factory.cc(76) : error C2220: warning treated as error - no 'object' file generated
c:\b\c\b\win\src\third_party\webrtc\media\engine\convert_legacy_video_factory.cc(76) : warning C4700: uninitialized local variable 'info' used

Owning it until tree is back to green.

Tree is back to green.

It's still happening.  Bug 787299 .

Indeed auto-rolls of webrtc are not detecting the compile error and keep on happening.

I think what happened is that the autoroll passed through the CQ because the warning is only happening on Debug builds, and the CQ only runs win-msvc-rel by default.

There is a win-msvc-dbg bot on the CQ too, but currently only as a 5% experiment since it needs more buildbot capacity.

+Dirk for the above.

I wouldn't expect the lack of coverage here to be a common problem, so I think WebRTC just got unlucky here. If you wanted to, you could force the autoroll CLs to include win-msvc-dbg in the CQ.

The following revision refers to this bug:
  https://webrtc.googlesource.com/src.git/+/09d584457a235af956c658b01e6a6725bb81ab6e

commit 09d584457a235af956c658b01e6a6725bb81ab6e
Author: Magnus Jedvert <magjed@webrtc.org>
Date: Tue Nov 21 19:09:58 2017

Fix some uninitialized variables in convert_legacy_video_factory

This is causing compilation failure on Chrome on Windows using MSVC
64bits.

TBR=andersc@webrtc.org

Bug:  chromium:787192 
Change-Id: If82290a9d7373385de4820b34f2c7dc9225c3d95
Reviewed-on: https://webrtc-review.googlesource.com/24981
Reviewed-by: Magnus Jedvert <magjed@webrtc.org>
Commit-Queue: Magnus Jedvert <magjed@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#20821}
[modify] https://crrev.com/09d584457a235af956c658b01e6a6725bb81ab6e/media/engine/convert_legacy_video_factory.cc

Yup, we'll get the debug configuration into the CQ asap.

 Issue 787299  has been merged into this issue.

It seems it'll take about 8h for the WebRTC fix to roll in so I'll revert the last roll now (what I should have done before anyway). 

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/38ed51a81113bf72765cb66d5a8a1653bc502165

commit 38ed51a81113bf72765cb66d5a8a1653bc502165
Author: Carlos Knippschild <carlosk@chromium.org>
Date: Tue Nov 21 23:22:42 2017

Revert "Roll src/third_party/webrtc/ 202be3957..ed1023db0 (19 commits)"

This reverts commit a2ec7611b737aba9a7d4d807ba44d5dc9cb55de4.

Reason for revert: This roll still does not include the fix for the build error on "chromium.win/WinMSVC64 (dbg)".
This had to be manually adjusted to the last working commit.

Original change's description:
> Roll src/third_party/webrtc/ 202be3957..ed1023db0 (19 commits)
>
> https://webrtc.googlesource.com/src.git/+log/202be3957d95..ed1023db0eb8
>
> $ git log 202be3957..ed1023db0 --date=short --no-merges --format='%ad %ae %s'
>
> Created with:
>   roll-dep src/third_party/webrtc
> BUG=None
>
>
> The AutoRoll server is located here: https://webrtc-chromium-roll.skia.org
>
> Documentation for the AutoRoller is here:
> https://skia.googlesource.com/buildbot/+/master/autoroll/README.md
>
> If the roll is causing failures, please contact the current sheriff, who should
> be CC'd on the roll, and stop the roller if necessary.
>
>
> CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_chromium_archive_rel_ng;master.tryserver.chromium.mac:mac_chromium_archive_rel_ng
> TBR=webrtc-chromium-sheriffs-robots@google.com
>
> Change-Id: I660131e50f90463ee04ddd62292b7858525a8b03
> Reviewed-on: https://chromium-review.googlesource.com/781366
> Reviewed-by: WebRTC Roll Bot <webrtc-autoroll@chromium.org>
> Commit-Queue: WebRTC Roll Bot <webrtc-autoroll@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#518294}

TBR=webrtc-autoroll@chromium.org,webrtc-chromium-sheriffs-robots@google.com

Change-Id: I79ff7c5d777a62975b20ed5678f982b4e7f7d4ce
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug:  787192 
Cq-Include-Trybots: master.tryserver.chromium.linux:linux_chromium_archive_rel_ng;master.tryserver.chromium.mac:mac_chromium_archive_rel_ng
Reviewed-on: https://chromium-review.googlesource.com/783850
Commit-Queue: Carlos Knippschild <carlosk@chromium.org>
Reviewed-by: Carlos Knippschild <carlosk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#518435}
[modify] https://crrev.com/38ed51a81113bf72765cb66d5a8a1653bc502165/DEPS

Successful build. Fixed.