Roll src/third_party/webrtc e7547d55453e..a1ead6f2ab75 (3 commits)

https://webrtc.googlesource.com/src.git/+log/e7547d55453e..a1ead6f2ab75


git log e7547d55453e..a1ead6f2ab75 --date=short --no-merges --format='%ad %ae %s'
2018-11-05 sprang@webrtc.org Update EncoderProxy to use EncoderInfo
2018-11-05 landby@gmail.com Add IPv6 configuration parameters to iOS API
2018-11-05 chromium-webrtc-autoroll@webrtc-ci.iam.gserviceaccount.com Roll chromium_revision 4e7c87b5..c26ff44a (605184:605286)


Created with:
  gclient setdep -r src/third_party/webrtc@a1ead6f2ab75

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: I9d901cfb3fa6823db32828a195029fcda02d7e05
Reviewed-on: https://chromium-review.googlesource.com/c/1317726Reviewed-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@{#605316}

DEPS

@@ -1161,7 +1161,7 @@ deps = {
     Var('chromium_git') + '/external/khronosgroup/webgl.git' + '@' + '0d55c887e92b645f6effe753528323ab2ffd94c2',
 
   'src/third_party/webrtc':
-    Var('webrtc_git') + '/src.git' + '@' + 'e7547d55453e23134ede6f5f1bcb82bcc649eb4a',
+    Var('webrtc_git') + '/src.git' + '@' + 'a1ead6f2ab755e13c97db05134b150771c48bb2a',
 
   'src/third_party/xdg-utils': {
       'url': Var('chromium_git') + '/chromium/deps/xdg-utils.git' + '@' + 'd80274d5869b17b8c9067a1022e4416ee7ed5e0d',