Roll WebRTC from 7a82467d0db0 to af0d5bca34b1 (2 revisions)

https://webrtc.googlesource.com/src.git/+log/7a82467d0db0..af0d5bca34b1

2020-06-22 jakobi@webrtc.org Remove ANA FEC control in Opus encoder.
2020-06-22 nisse@webrtc.org Delete SDP x-alt-protocol

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/+doc/master/autoroll/README.md

Bug: chromium:1086942
Tbr: webrtc-chromium-sheriffs-robots@google.com
Change-Id: If571c1f7ab282ef7ee4353833a24c5cf7ee69a1c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2257057Reviewed-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@{#780778}

DEPS

@@ -1452,7 +1452,7 @@ deps = {
   },
 
   'src/third_party/webrtc':
-    Var('webrtc_git') + '/src.git' + '@' + '7a82467d0db0d61f466a1da54b94f6a136726a3c',
+    Var('webrtc_git') + '/src.git' + '@' + 'af0d5bca34b14e2d0f9e98ddfe64ed04bcf25472',
 
   'src/third_party/libgifcodec':
      Var('skia_git') + '/libgifcodec' + '@'+  Var('libgifcodec_revision'),