Roll src/third_party/webrtc 957c62e0d63e..40b52f789661 (4 commits)

https://webrtc.googlesource.com/src.git/+log/957c62e0d63e..40b52f789661


git log 957c62e0d63e..40b52f789661 --date=short --no-merges --format='%ad %ae %s'
2018-10-01 buildbot@webrtc.org Roll chromium_revision 1190491c..7d2cf7c4 (595509:595610)
2018-10-01 orphis@webrtc.org Add support for send_encodings parameters in addTransceiver
2018-10-01 buildbot@webrtc.org Roll chromium_revision 148156b3..1190491c (595385:595509)
2018-10-01 ssilkin@webrtc.org Configure frame references in VP9 encoder wrapper.


Created with:
  gclient setdep -r src/third_party/webrtc@40b52f789661

The AutoRoll server is located here: https://autoroll.skia.org/r/webrtc-chromium-autoroll

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=luci.chromium.try:linux_chromium_archive_rel_ng;luci.chromium.try:mac_chromium_archive_rel_ng

BUG=chromium:None,chromium:None
TBR=webrtc-chromium-sheriffs-robots@google.com

Change-Id: Iafd0fc7e1e8f62417ce4d6d63d0b187b616af91e
Reviewed-on: https://chromium-review.googlesource.com/1256224Reviewed-by: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Commit-Queue: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#595727}

DEPS

@@ -1106,7 +1106,7 @@ deps = {
     Var('chromium_git') + '/external/khronosgroup/webgl.git' + '@' + '6d2f3f4cb8bac1f7c4a945c73d07a33df74f22f9',
 
   'src/third_party/webrtc':
-    Var('webrtc_git') + '/src.git' + '@' + '957c62e0d63eca6ac8b6c77d0391675d33fa0fe8',
+    Var('webrtc_git') + '/src.git' + '@' + '40b52f7896615f5b6074d7e216383440b92b3cb0',
 
   'src/third_party/xdg-utils': {
       'url': Var('chromium_git') + '/chromium/deps/xdg-utils.git' + '@' + 'd80274d5869b17b8c9067a1022e4416ee7ed5e0d',