Roll src/third_party/webrtc 1518fd34d888..80bc1acb9c2b (3 commits)

https://webrtc.googlesource.com/src.git/+log/1518fd34d888..80bc1acb9c2b

git log 1518fd34d888..80bc1acb9c2b --date=short --first-parent --format='%ad %ae %s'
2019-12-06 danilchap@webrtc.org Add implementations of the VideoRtpDepacketizer interface
2019-12-06 orphis@webrtc.org Reland "Add support for RtpEncodingParameters::max_framerate"
2019-12-06 titovartem@webrtc.org Fix: IvfFrameGenerator won't decode frame on release build

Created with:
  gclient setdep -r src/third_party/webrtc@80bc1acb9c2b

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

Bug: None
Tbr: webrtc-chromium-sheriffs-robots@google.com
Change-Id: I521fd606ee3ce38a7e9c99ee931303dc56f7b3c8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1955662Reviewed-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@{#722525}

DEPS

@@ -1498,7 +1498,7 @@ deps = {
     Var('chromium_git') + '/external/khronosgroup/webgl.git' + '@' + 'dd55f3ca8f2ea716ca917a4aaf36f0729fe902b1',
 
   'src/third_party/webrtc':
-    Var('webrtc_git') + '/src.git' + '@' + '1518fd34d8889bb9c3fbe8d8f9fdfd513a037e68',
+    Var('webrtc_git') + '/src.git' + '@' + '80bc1acb9c2b9d8096f356c748ec9b57e02759c9',
 
   'src/third_party/libgifcodec':
      Var('skia_git') + '/libgifcodec' + '@'+  Var('libgifcodec_revision'),