Roll src/third_party/webrtc 67309ef93c4f..af3fdc069d52 (1 commits)

https://webrtc.googlesource.com/src.git/+log/67309ef93c4f..af3fdc069d52

git log 67309ef93c4f..af3fdc069d52 --date=short --no-merges --format='%ad %ae %s'
2019-09-24 gustaf@webrtc.org AEC3: Suppression filter handles multiple channels

Created with:
  gclient setdep -r src/third_party/webrtc@af3fdc069d52

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/webrtc-chromium-autoroll
Please CC webrtc-chromium-sheriffs-robots@google.com on the revert to ensure that a human
is aware of the problem.

To report a problem with the AutoRoller itself, please file a bug:
https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

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

Bug: None
Change-Id: I66bd0e276abd212e4b99ab28b0843d211ad6d4a1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1821962Reviewed-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@{#699466}

DEPS

@@ -1425,7 +1425,7 @@ deps = {
     Var('chromium_git') + '/external/khronosgroup/webgl.git' + '@' + '7c4e67ff117d6c640e6dd17989afe2fb7da7eecb',
 
   'src/third_party/webrtc':
-    Var('webrtc_git') + '/src.git' + '@' + '67309ef93c4f8ff0c62d2d8806f79e69cd553b5c',
+    Var('webrtc_git') + '/src.git' + '@' + 'af3fdc069d528439fcd208ed4c4afd406ba9d63c',
 
   'src/third_party/xdg-utils': {
       'url': Var('chromium_git') + '/chromium/deps/xdg-utils.git' + '@' + 'd80274d5869b17b8c9067a1022e4416ee7ed5e0d',