Revert "Roll src/third_party/webrtc/ 83d27683a..e16927250 (15 commits)"

This reverts commit bcb8fea0.

Reason for revert: The first good commit is c3da1e61bccf4c6a37e871f5202f937ace78898a.

Original change's description:
> Roll src/third_party/webrtc/ 83d27683a..e16927250 (15 commits)
> 
> https://webrtc.googlesource.com/src.git/+log/83d27683a83d..e169272507de
> 
> $ git log 83d27683a..e16927250 --date=short --no-merges --format='%ad %ae %s'
> 
> Created with:
>   roll-dep src/third_party/webrtc
> BUG=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: Iaffdd6e8ce61b9580f183b627c815c7ef3dc6cfd
> Reviewed-on: https://chromium-review.googlesource.com/808745
> Reviewed-by: WebRTC Roll Bot <webrtc-autoroll@chromium.org>
> Commit-Queue: WebRTC Roll Bot <webrtc-autoroll@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#521706}

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

Change-Id: Icc268a1e246a3f689c5a497d961e8c73f73531d0
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: None
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/809166Reviewed-by: Henrik Boström <hbos@chromium.org>
Commit-Queue: Henrik Boström <hbos@chromium.org>
Cr-Commit-Position: refs/heads/master@{#521711}

DEPS

@@ -634,7 +634,7 @@ deps = {
     Var('chromium_git') + '/external/khronosgroup/webgl.git' + '@' + '05591bbeae6592fd924caec8e728a4ea86cbb8c9',
 
   'src/third_party/webrtc':
-    Var('webrtc_git') + '/src.git' + '@' + 'e169272507de938ba317ba55e1f175b6a513aa1b', # commit position 20628
+    Var('webrtc_git') + '/src.git' + '@' + '83d27683a83d8c4307ca9275779e822cb4604ccf', # commit position 20628
 
   'src/third_party/xdg-utils': {
       'url': Var('chromium_git') + '/chromium/deps/xdg-utils.git' + '@' + 'd80274d5869b17b8c9067a1022e4416ee7ed5e0d',