Roll WebRTC from 6a9a910fd2c3 to bedb605c8272 (6 revisions)

https://webrtc.googlesource.com/src.git/+log/6a9a910fd2c3..bedb605c8272

2020-08-20 hta@webrtc.org Transition ICE gathering state to "new" once all transports go away
2020-08-20 chromium-webrtc-autoroll@webrtc-ci.iam.gserviceaccount.com Roll chromium_revision 7a8fca54..4591d36d (800031:800155)
2020-08-20 jasonlon@google.com DTMF Event Sub-API on VoIP API
2020-08-20 minyue@webrtc.org Send estimated capture clock offset when sending Abs-capture-time RTP header extension.
2020-08-20 peah@webrtc.org Removing call to deprecated SetExtraOptions method
2020-08-20 jakobi@webrtc.org Reland "Call OnReceivedOverhead after audio network adaptor is created."

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,chromium:1115080
Tbr: webrtc-chromium-sheriffs-robots@google.com
Change-Id: I83400f9b3e8330520c56322d3a2fa9cd32094ee1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2368433Reviewed-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@{#800415}

DEPS

@@ -1470,7 +1470,7 @@ deps = {
   },
 
   'src/third_party/webrtc':
-    Var('webrtc_git') + '/src.git' + '@' + '6a9a910fd2c302ae58305cbd68739e1c5e70011d',
+    Var('webrtc_git') + '/src.git' + '@' + 'bedb605c82720509975daa4e05146f55d3d09e10',
 
   'src/third_party/libgifcodec':
      Var('skia_git') + '/libgifcodec' + '@'+  Var('libgifcodec_revision'),