Roll src/third_party/webrtc 712a26f3842b..f534a6404772 (4 commits)

https://webrtc.googlesource.com/src.git/+log/712a26f3842b..f534a6404772

git log 712a26f3842b..f534a6404772 --date=short --first-parent --format='%ad %ae %s'
2019-11-25 gustaf@webrtc.org AEC3: Sub-band nearend detector
2019-11-25 ssilkin@webrtc.org Allow min start bitrate to be lower than min bitrate.
2019-11-25 chromium-webrtc-autoroll@webrtc-ci.iam.gserviceaccount.com Roll chromium_revision 0ec8ef3c..e0dd604c (718517:718623)
2019-11-25 philipel@webrtc.org Fix VideoStreamEncoder to not reference encoded data from the RunPostEncode task.

Created with:
  gclient setdep -r src/third_party/webrtc@f534a6404772

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: chromium:b/130016532,chromium:none,chromium:None
Tbr: webrtc-chromium-sheriffs-robots@google.com
Change-Id: Ie49d39846129313cef04a70187b5e06fcba80c44
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1933755Reviewed-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@{#718764}

DEPS

@@ -1494,7 +1494,7 @@ deps = {
     Var('chromium_git') + '/external/khronosgroup/webgl.git' + '@' + 'dd55f3ca8f2ea716ca917a4aaf36f0729fe902b1',
 
   'src/third_party/webrtc':
-    Var('webrtc_git') + '/src.git' + '@' + '712a26f3842b4eba1f38c3ba7371b1cf771fd232',
+    Var('webrtc_git') + '/src.git' + '@' + 'f534a640477264e6414dc461c961c9212c48d8ea',
 
   # 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.