Roll WebRTC from 1b485322085d to afdbf8e6f881 (2 revisions)

https://webrtc.googlesource.com/src.git/+log/1b485322085d..afdbf8e6f881

2020-06-24 chemag@fb.com H264: Fix stap-a-to-annex-b loop over-read
2020-06-24 fippo@sip-communicator.org red: modify the encoder to send RFC 2198

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: None
Tbr: webrtc-chromium-sheriffs-robots@google.com
Change-Id: If593d70319c0e3d27da5153ac323740cabfec136
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2265487Reviewed-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@{#782245}

DEPS

@@ -1458,7 +1458,7 @@ deps = {
   },
 
   'src/third_party/webrtc':
-    Var('webrtc_git') + '/src.git' + '@' + '1b485322085d941a9ec08acc6da3a05e6f5fb5e5',
+    Var('webrtc_git') + '/src.git' + '@' + 'afdbf8e6f881bda6cfe8c8c8c46f2167db8b0b05',
 
   'src/third_party/libgifcodec':
      Var('skia_git') + '/libgifcodec' + '@'+  Var('libgifcodec_revision'),