Roll src/third_party/webrtc 056d811b6a04..4597e0c46fc5 (4 commits)

https://webrtc.googlesource.com/src.git/+log/056d811b6a04..4597e0c46fc5


git log 056d811b6a04..4597e0c46fc5 --date=short --no-merges --format='%ad %ae %s'
2018-07-17 buildbot@webrtc.org Roll chromium_revision 6a67eff9..c0988740 (575413:575517)
2018-07-16 jtteh@webrtc.org Revert "Remove RTPVideoHeader::h264() accessors."
2018-07-16 buildbot@webrtc.org Roll chromium_revision 36688868..6a67eff9 (575305:575413)
2018-07-16 jtteh@webrtc.org Revert "Move allocation and rtp conversion logic out of payload router."


Created with:
  gclient setdep -r src/third_party/webrtc@4597e0c46fc5

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

Change-Id: Ia7c71c96135c5c392c1e17d36970ced50144de05
Reviewed-on: https://chromium-review.googlesource.com/1139436Reviewed-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@{#575550}

DEPS

@@ -1045,7 +1045,7 @@ deps = {
     Var('chromium_git') + '/external/khronosgroup/webgl.git' + '@' + 'a5c263cc63ffc2cc189b5214074c8792067c1853',
 
   'src/third_party/webrtc':
-    Var('webrtc_git') + '/src.git' + '@' + '056d811b6a044cd7e02da1133a520bc2d489836f',
+    Var('webrtc_git') + '/src.git' + '@' + '4597e0c46fc5ecb1c63c325f87f91bdfc3c1c3fd',
 
   'src/third_party/xdg-utils': {
       'url': Var('chromium_git') + '/chromium/deps/xdg-utils.git' + '@' + 'd80274d5869b17b8c9067a1022e4416ee7ed5e0d',