Roll src/third_party/webrtc dcc910a2095d..f47c2ab889d9 (3 commits)

https://webrtc.googlesource.com/src.git/+log/dcc910a2095d..f47c2ab889d9

git log dcc910a2095d..f47c2ab889d9 --date=short --no-merges --format='%ad %ae %s'
2019-11-12 mbonadei@webrtc.org RTC_EXPORT webrtc::RTCNonStandardStatsMember<T>.
2019-11-12 chromium-webrtc-autoroll@webrtc-ci.iam.gserviceaccount.com Roll chromium_revision 3b0967fe..0717a4dc (714463:714607)
2019-11-12 thaloun@chromium.org Don't ask for the friendly name of a default device if we failed to enumerate it.

Created with:
  gclient setdep -r src/third_party/webrtc@f47c2ab889d9

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

TBR=webrtc-chromium-sheriffs-robots@google.com

Bug: chromium:None,chromium:b/144233691
Change-Id: I59f911eecf553a37ac77ab448c49fd62475ef7d6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1913542Reviewed-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@{#714753}

DEPS

@@ -1484,7 +1484,7 @@ deps = {
     Var('chromium_git') + '/external/khronosgroup/webgl.git' + '@' + 'dd55f3ca8f2ea716ca917a4aaf36f0729fe902b1',
 
   'src/third_party/webrtc':
-    Var('webrtc_git') + '/src.git' + '@' + 'dcc910a2095de4077bda3cd5a9c3e217e3b0b5df',
+    Var('webrtc_git') + '/src.git' + '@' + 'f47c2ab889d968888979fa31bd8229543c76967d',
 
   # Wuffs' canonical repository is at github.com/google/wuffs, but we use
   # Skia's mirror of Wuffs, the same as in upstream Skia's DEPS file.