Roll src/third_party/webrtc b9bb9e3f6683..bb081a62dc30 (5 commits)

https://webrtc.googlesource.com/src.git/+log/b9bb9e3f6683..bb081a62dc30


git log b9bb9e3f6683..bb081a62dc30 --date=short --no-merges --format='%ad %ae %s'
2018-09-06 ssilkin@webrtc.org Update sending resolution only on top spatial layer frame.
2018-09-06 andersc@webrtc.org Generate umbrella header for macOS framework.
2018-09-06 ssilkin@webrtc.org Frame rate controller per spatial layer.
2018-09-06 buildbot@webrtc.org Roll chromium_revision 87a4e8f8..fcd25fc0 (588971:589073)
2018-09-05 steveanton@webrtc.org Revert "Use AsyncInvoker in PeerConnection instead of MessageHandler"


Created with:
  gclient setdep -r src/third_party/webrtc@bb081a62dc30

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.

CQ_INCLUDE_TRYBOTS=luci.chromium.try:linux_chromium_archive_rel_ng;luci.chromium.try:mac_chromium_archive_rel_ng

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

Change-Id: I5bcb0182c886838d5bec2a3ffbca953015b4087a
Reviewed-on: https://chromium-review.googlesource.com/1209802Reviewed-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@{#589238}

DEPS

@@ -1098,7 +1098,7 @@ deps = {
     Var('chromium_git') + '/external/khronosgroup/webgl.git' + '@' + '7ca87fb1d3da3b3d2060886e8c58e726d74c8219',
 
   'src/third_party/webrtc':
-    Var('webrtc_git') + '/src.git' + '@' + 'b9bb9e3f6683a74acab9198359d17a3b68644338',
+    Var('webrtc_git') + '/src.git' + '@' + 'bb081a62dc30a49fa77cfdbb4ae470c5137fa547',
 
   'src/third_party/xdg-utils': {
       'url': Var('chromium_git') + '/chromium/deps/xdg-utils.git' + '@' + 'd80274d5869b17b8c9067a1022e4416ee7ed5e0d',