Roll src/third_party/webrtc 88c1a9ecbc52..1beef1a97aa7 (3 commits)

https://webrtc.googlesource.com/src.git/+log/88c1a9ecbc52..1beef1a97aa7


git log 88c1a9ecbc52..1beef1a97aa7 --date=short --no-merges --format='%ad %ae %s'
2018-09-03 nisse@webrtc.org Delete VideoSendStream::EnableEncodedFrameRecording.
2018-09-03 fippo@andyet.com getStats: add kind alias for mediaType
2018-09-03 ivoc@webrtc.org Restructure neteq_rtpplay into a library with small executable wrapper.


Created with:
  gclient setdep -r src/third_party/webrtc@1beef1a97aa7

The AutoRoll server is located here: https://autoroll.skia.org/r/webrtc-chromium-autoroll

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

If the roll is causing failures, please contact the current sheriff, who should
be CC'd on the roll, and stop the roller if necessary.

CQ_INCLUDE_TRYBOTS=luci.chromium.try:linux_chromium_archive_rel_ng;luci.chromium.try:mac_chromium_archive_rel_ng

BUG=chromium:None
TBR=webrtc-chromium-sheriffs-robots@google.com

Change-Id: Iaac54d3c9742314d454015faee006d1790452600
Reviewed-on: https://chromium-review.googlesource.com/1202342Reviewed-by: webrtc-chromium-autoroll <webrtc-chromium-autoroll@skia-buildbots.google.com.iam.gserviceaccount.com>
Commit-Queue: webrtc-chromium-autoroll <webrtc-chromium-autoroll@skia-buildbots.google.com.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#588406}

DEPS

@@ -1098,7 +1098,7 @@ deps = {
     Var('chromium_git') + '/external/khronosgroup/webgl.git' + '@' + '7ca87fb1d3da3b3d2060886e8c58e726d74c8219',
 
   'src/third_party/webrtc':
-    Var('webrtc_git') + '/src.git' + '@' + '88c1a9ecbc52f60b8f79a0111c54b9c9600c1c5a',
+    Var('webrtc_git') + '/src.git' + '@' + '1beef1a97aa7e9a3f50776e100fa2bc7c63fcdd8',
 
   'src/third_party/xdg-utils': {
       'url': Var('chromium_git') + '/chromium/deps/xdg-utils.git' + '@' + 'd80274d5869b17b8c9067a1022e4416ee7ed5e0d',