Roll src/third_party/webrtc ea9798c5eb96..fd643a4782c9 (2 commits)

https://webrtc.googlesource.com/src.git/+log/ea9798c5eb96..fd643a4782c9

git log ea9798c5eb96..fd643a4782c9 --date=short --no-merges --format='%ad %ae %s'
2019-07-31 pacaro@google.com Build core audio for older windows versions
2019-07-31 chromium-webrtc-autoroll@webrtc-ci.iam.gserviceaccount.com Roll chromium_revision 1bdd7918..d488661c (682806:682945)

Created with:
  gclient setdep -r src/third_party/webrtc@fd643a4782c9

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
Change-Id: Ib4080c3b5779d8786ad015ad9107ee1ffadc981a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1729206Reviewed-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@{#683046}

DEPS

@@ -1375,7 +1375,7 @@ deps = {
     Var('chromium_git') + '/external/khronosgroup/webgl.git' + '@' + 'abaae129d9a0c6e1e092067e0b105475df43352e',
 
   'src/third_party/webrtc':
-    Var('webrtc_git') + '/src.git' + '@' + 'ea9798c5eb9618d524558ee4ef9610aec8b72027',
+    Var('webrtc_git') + '/src.git' + '@' + 'fd643a4782c9d70b683b8638e4f71e06e3650680',
 
   'src/third_party/xdg-utils': {
       'url': Var('chromium_git') + '/chromium/deps/xdg-utils.git' + '@' + 'd80274d5869b17b8c9067a1022e4416ee7ed5e0d',