Roll src/third_party/webrtc a0e9943ca69a..d9b4f3330fdb (3 commits)

https://webrtc.googlesource.com/src.git/+log/a0e9943ca69a..d9b4f3330fdb


git log a0e9943ca69a..d9b4f3330fdb --date=short --no-merges --format='%ad %ae %s'
2019-05-24 srte@webrtc.org Cleanup of AudioAllocationSettings flags.
2019-05-24 sprang@webrtc.org Add test to cover bug in vp9 wrapper, triggered by field trial
2019-05-24 ossu@webrtc.org Avoid the render lock in AudioProcessingImpl::ProcessStream


Created with:
  gclient setdep -r src/third_party/webrtc@d9b4f3330fdb

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

Change-Id: I8bb6ab825945c050d25707960ca26e0373cb93a8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1627909Reviewed-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@{#663139}

DEPS

@@ -1350,7 +1350,7 @@ deps = {
     Var('chromium_git') + '/external/khronosgroup/webgl.git' + '@' + '6f0b34abee8dba611c253738d955c59f703c147a',
 
   'src/third_party/webrtc':
-    Var('webrtc_git') + '/src.git' + '@' + 'a0e9943ca69a826a2b0997361773cb96655e2bd7',
+    Var('webrtc_git') + '/src.git' + '@' + 'd9b4f3330fdbe45ac74ba7c96c78512d99c0ef98',
 
   'src/third_party/xdg-utils': {
       'url': Var('chromium_git') + '/chromium/deps/xdg-utils.git' + '@' + 'd80274d5869b17b8c9067a1022e4416ee7ed5e0d',