Roll src/third_party/webrtc 9a7970de2813..4e4fc628abde (2 commits)

https://webrtc.googlesource.com/src.git/+log/9a7970de2813..4e4fc628abde


git log 9a7970de2813..4e4fc628abde --date=short --no-merges --format='%ad %ae %s'
2019-05-16 chromium-webrtc-autoroll@webrtc-ci.iam.gserviceaccount.com Roll chromium_revision 34a27578..609f581d (660187:660301)
2019-05-15 steveanton@webrtc.org Thread safe crc32 table initialization


Created with:
  gclient setdep -r src/third_party/webrtc@4e4fc628abde

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: I9e76e2caf18a53af1d3561e288e74666e144c873
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1614522Reviewed-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@{#660327}

DEPS

@@ -1345,7 +1345,7 @@ deps = {
     Var('chromium_git') + '/external/khronosgroup/webgl.git' + '@' + '6f0b34abee8dba611c253738d955c59f703c147a',
 
   'src/third_party/webrtc':
-    Var('webrtc_git') + '/src.git' + '@' + '9a7970de2813d43155321756b1da3d875a22b8f9',
+    Var('webrtc_git') + '/src.git' + '@' + '4e4fc628abde351512b88af5c0000057c8ecd18f',
 
   'src/third_party/xdg-utils': {
       'url': Var('chromium_git') + '/chromium/deps/xdg-utils.git' + '@' + 'd80274d5869b17b8c9067a1022e4416ee7ed5e0d',