Roll src/third_party/webrtc 3472b9ae22ff..e8df48220589 (3 commits)

https://webrtc.googlesource.com/src.git/+log/3472b9ae22ff..e8df48220589


git log 3472b9ae22ff..e8df48220589 --date=short --no-merges --format='%ad %ae %s'
2019-06-26 eladalon@webrtc.org Clean-up after CL #140941
2019-06-26 danilchap@webrtc.org Add optimization to PacketRouter for large number of senders.
2019-06-26 chxg@google.com Replace the implementation of `GetContributingSources()` on the video side.


Created with:
  gclient setdep -r src/third_party/webrtc@e8df48220589

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.



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

Change-Id: I1450a295a58a0f23df15b13c243d12bc8f0dff05
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1678678Reviewed-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@{#672559}

DEPS

@@ -1364,7 +1364,7 @@ deps = {
     Var('chromium_git') + '/external/khronosgroup/webgl.git' + '@' + '6f0b34abee8dba611c253738d955c59f703c147a',
 
   'src/third_party/webrtc':
-    Var('webrtc_git') + '/src.git' + '@' + '3472b9ae22ff26fb663d4e74721d0238dc7aa5be',
+    Var('webrtc_git') + '/src.git' + '@' + 'e8df48220589004f434c5aa99090d992b590290d',
 
   'src/third_party/xdg-utils': {
       'url': Var('chromium_git') + '/chromium/deps/xdg-utils.git' + '@' + 'd80274d5869b17b8c9067a1022e4416ee7ed5e0d',