Roll src/third_party/webrtc 3cc2f70bc33c..efffd0a5fa22 (4 commits)

https://webrtc.googlesource.com/src.git/+log/3cc2f70bc33c..efffd0a5fa22

git log 3cc2f70bc33c..efffd0a5fa22 --date=short --no-merges --format='%ad %ae %s'
2019-08-08 chromium-webrtc-autoroll@webrtc-ci.iam.gserviceaccount.com Roll chromium_revision 3d0c0436..5744654b (684897:685023)
2019-08-07 chromium-webrtc-autoroll@webrtc-ci.iam.gserviceaccount.com Roll chromium_revision 006302cd..3d0c0436 (684781:684897)
2019-08-07 alexnarest@google.com Reland of "Reporting of decoding_codec_plc events""
2019-08-07 steveanton@webrtc.org Filter out duplicate receive codecs in the media engine

Created with:
  gclient setdep -r src/third_party/webrtc@efffd0a5fa22

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.


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

Bug: chromium:None,chromium:None,chromium:987598
Change-Id: I195e6a03ded5b8213321851c708d75a2823ddcae
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1742963Reviewed-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@{#685110}

DEPS

@@ -1375,7 +1375,7 @@ deps = {
     Var('chromium_git') + '/external/khronosgroup/webgl.git' + '@' + 'abaae129d9a0c6e1e092067e0b105475df43352e',
 
   'src/third_party/webrtc':
-    Var('webrtc_git') + '/src.git' + '@' + '3cc2f70bc33c3bfba6732d896e8c25a861d9b8b7',
+    Var('webrtc_git') + '/src.git' + '@' + 'efffd0a5fa22c3eb5c3182d44cfe2917563cedbc',
 
   'src/third_party/xdg-utils': {
       'url': Var('chromium_git') + '/chromium/deps/xdg-utils.git' + '@' + 'd80274d5869b17b8c9067a1022e4416ee7ed5e0d',