Roll src/third_party/webrtc a47ba4119f27..8f01c4e1b654 (3 commits)

https://webrtc.googlesource.com/src.git/+log/a47ba4119f27..8f01c4e1b654


git log a47ba4119f27..8f01c4e1b654 --date=short --no-merges --format='%ad %ae %s'
2019-06-28 eladalon@webrtc.org Define FecControllerOverride and plumb it down to VideoEncoder
2019-06-28 danilchap@webrtc.org Add trait to Build/Parse DependencyDescriptor rtp header extension
2019-06-28 kwiberg@webrtc.org Initialize signal processing function pointers statically


Created with:
  gclient setdep -r src/third_party/webrtc@8f01c4e1b654

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.


TBR=webrtc-chromium-sheriffs-robots@google.com

Change-Id: I3273b3dfceb7f9e01950a9245ce9788c2e5fd840
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1682090Reviewed-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@{#673410}

DEPS

@@ -1364,7 +1364,7 @@ deps = {
     Var('chromium_git') + '/external/khronosgroup/webgl.git' + '@' + '6f0b34abee8dba611c253738d955c59f703c147a',
 
   'src/third_party/webrtc':
-    Var('webrtc_git') + '/src.git' + '@' + 'a47ba4119f27fa84831f16b2f7764a5439145a0d',
+    Var('webrtc_git') + '/src.git' + '@' + '8f01c4e1b654028fd69e5d21721db47c99c7ae4f',
 
   'src/third_party/xdg-utils': {
       'url': Var('chromium_git') + '/chromium/deps/xdg-utils.git' + '@' + 'd80274d5869b17b8c9067a1022e4416ee7ed5e0d',