Roll src/third_party/webrtc 73aa2de3d761..6c13fd907145 (1 commits)

https://webrtc.googlesource.com/src.git/+log/73aa2de3d761..6c13fd907145

git log 73aa2de3d761..6c13fd907145 --date=short --first-parent --format='%ad %ae %s'
2020-01-21 eshr@google.com Move bandwidth overuse detection out of VideoStreamEncoder

Created with:
  gclient setdep -r src/third_party/webrtc@6c13fd907145

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: I4538995d5dced93f4b07c21bafa5d48f1638a531
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2012225Reviewed-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@{#733579}

DEPS

@@ -1501,7 +1501,7 @@ deps = {
     Var('chromium_git') + '/external/github.com/gpuweb/cts.git' + '@' + 'ec18cc3262922e7dcdbe70243c6f40606f979144',
 
   'src/third_party/webrtc':
-    Var('webrtc_git') + '/src.git' + '@' + '73aa2de3d7613c54b7d0b45ee5df2faa7c0635d4',
+    Var('webrtc_git') + '/src.git' + '@' + '6c13fd9071453b435b46b04e52794c8172988a66',
 
   'src/third_party/libgifcodec':
      Var('skia_git') + '/libgifcodec' + '@'+  Var('libgifcodec_revision'),