Roll WebRTC from 93a9d19d4eb5 to 6a9a910fd2c3 (1 revision)

https://webrtc.googlesource.com/src.git/+log/93a9d19d4eb5..6a9a910fd2c3

2020-08-20 handellm@webrtc.org AudioDeviceWindowsCore: fix mutex recursion.

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: I50a3dace0368ed0c20e067620f737941e258fbcd
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2367175Reviewed-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@{#800221}

DEPS

@@ -1470,7 +1470,7 @@ deps = {
   },
 
   'src/third_party/webrtc':
-    Var('webrtc_git') + '/src.git' + '@' + '93a9d19d4eb53b3f4fb4d22e6c54f2e2824437eb',
+    Var('webrtc_git') + '/src.git' + '@' + '6a9a910fd2c302ae58305cbd68739e1c5e70011d',
 
   'src/third_party/libgifcodec':
      Var('skia_git') + '/libgifcodec' + '@'+  Var('libgifcodec_revision'),