Roll src/third_party/webrtc 3c91b31162b8..b05ca4b6168c (1 commits)

https://webrtc.googlesource.com/src.git/+log/3c91b31162b8..b05ca4b6168c

git log 3c91b31162b8..b05ca4b6168c --date=short --first-parent --format='%ad %ae %s'
2020-03-05 orphis@webrtc.org Implement new specification for degradation preference

Created with:
  gclient setdep -r src/third_party/webrtc@b05ca4b6168c

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: Ice79f35e77f79b0225b738a4395ca58f75597e59
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2090071Reviewed-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@{#747331}

DEPS

@@ -1443,7 +1443,7 @@ deps = {
     Var('chromium_git') + '/external/github.com/gpuweb/cts.git' + '@' + 'ec18cc3262922e7dcdbe70243c6f40606f979144',
 
   'src/third_party/webrtc':
-    Var('webrtc_git') + '/src.git' + '@' + '3c91b31162b88a3b38f227a0c681115f2a20a1dd',
+    Var('webrtc_git') + '/src.git' + '@' + 'b05ca4b6168ccad0db5f6350d438272e59a3b9ca',
 
   'src/third_party/libgifcodec':
      Var('skia_git') + '/libgifcodec' + '@'+  Var('libgifcodec_revision'),