Roll src/third_party/webrtc d39ce8d45bc9..bf7463b88f7b (6 commits)

https://webrtc.googlesource.com/src.git/+log/d39ce8d45bc9..bf7463b88f7b


git log d39ce8d45bc9..bf7463b88f7b --date=short --no-merges --format='%ad %ae %s'
2018-07-06 magjed@webrtc.org Android: Update tests to use new SurfaceTextureHelper interface
2018-07-06 sprang@webrtc.org Stop using VideoCodec.targetBitrate for vp8 screenshare config
2018-07-06 aleloi@webrtc.org Allow AGC2 level estimation in AgcManagerDirect.
2018-07-06 minyue@webrtc.org Making PacketDuration always consistent with Decode in FakeDecodeFromFile.
2018-07-06 aleloi@webrtc.org Break out Agc code from audio_processing.
2018-07-06 philipel@webrtc.org Unwrap TL0 pic index to avoid having to work with a wrapped number.


Created with:
  gclient setdep -r src/third_party/webrtc@bf7463b88f7b

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:855211
TBR=webrtc-chromium-sheriffs-robots@google.com

Change-Id: I5b6356d26e6778d8544acf20696845d290ae7138
Reviewed-on: https://chromium-review.googlesource.com/1128100
Reviewed-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@{#573041}