Roll src/third_party/webrtc 261fc5197ea8..27c293665e3a (2 commits)

https://webrtc.googlesource.com/src.git/+log/261fc5197ea8..27c293665e3a

git log 261fc5197ea8..27c293665e3a --date=short --no-merges --format='%ad %ae %s'
2019-10-23 hbos@webrtc.org Implement an OperationsChain, to be used by PeerConnection in follow-up.
2019-10-23 asapersson@webrtc.org Add estimatedPlayoutTimestamp to RTCInboundRTPStreamStats.

Created with:
  gclient setdep -r src/third_party/webrtc@27c293665e3a

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: None
Change-Id: I285eb5ea5f2bde9c417ca151b7fa0851877b1e24
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1876070Reviewed-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@{#708571}

DEPS

@@ -1509,7 +1509,7 @@ deps = {
     Var('chromium_git') + '/external/khronosgroup/webgl.git' + '@' + '2701c130839edbeb226735b0775966b6423d9e83',
 
   'src/third_party/webrtc':
-    Var('webrtc_git') + '/src.git' + '@' + '261fc5197ea832181a162b67030fb330c3da6841',
+    Var('webrtc_git') + '/src.git' + '@' + '27c293665e3a2b0e2de12236529773a7b9057f6e',
 
   # 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.