Roll src/third_party/webrtc e71d1bb7fc22..7f5175a4552d (4 commits)

https://webrtc.googlesource.com/src.git/+log/e71d1bb7fc22..7f5175a4552d


git log e71d1bb7fc22..7f5175a4552d --date=short --no-merges --format='%ad %ae %s'
2018-07-25 peah@webrtc.org AEC3: Corrected the filter adjustment during analog gain changes
2018-07-25 nisse@webrtc.org Delete root header file typedef.h.
2018-07-25 titovartem@webrtc.org Move sigslot to proper third_party directory
2018-07-25 buildbot@webrtc.org Roll chromium_revision deb63e97..f2569c57 (577752:577860)


Created with:
  gclient setdep -r src/third_party/webrtc@7f5175a4552d

The AutoRoll server is located here: https://webrtc-chromium-roll.skia.org

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.

CQ_INCLUDE_TRYBOTS=luci.chromium.try:linux_chromium_archive_rel_ng;master.tryserver.chromium.mac:mac_chromium_archive_rel_ng

BUG=chromium:867373,chromium:None
TBR=webrtc-chromium-sheriffs-robots@google.com

Change-Id: Ic9e3aaf5ed93f9a14cea51a76a0a6658e859d3a2
Reviewed-on: https://chromium-review.googlesource.com/1150300Reviewed-by: webrtc-chromium-autoroll <webrtc-chromium-autoroll@skia-buildbots.google.com.iam.gserviceaccount.com>
Commit-Queue: webrtc-chromium-autoroll <webrtc-chromium-autoroll@skia-buildbots.google.com.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#577970}

DEPS

@@ -1034,7 +1034,7 @@ deps = {
     Var('chromium_git') + '/external/khronosgroup/webgl.git' + '@' + '21dbf06b5aa6c7dc8cf56314d4a3f96f57956c53',
 
   'src/third_party/webrtc':
-    Var('webrtc_git') + '/src.git' + '@' + 'e71d1bb7fc22c7a08f34391b69c722d07c2100f2',
+    Var('webrtc_git') + '/src.git' + '@' + '7f5175a4552db9af5cb5f15d307c5c0c690cf8f9',
 
   'src/third_party/xdg-utils': {
       'url': Var('chromium_git') + '/chromium/deps/xdg-utils.git' + '@' + 'd80274d5869b17b8c9067a1022e4416ee7ed5e0d',