Roll src/third_party/webrtc 159b417c9827..fb075d558d6d (2 commits)

https://webrtc.googlesource.com/src.git/+log/159b417c9827..fb075d558d6d

git log 159b417c9827..fb075d558d6d --date=short --no-merges --format='%ad %ae %s'
2019-10-31 minyue@webrtc.org Removing unused Opus wrapper API: WebRTCOpus_DecodePlc.
2019-10-31 peah@webrtc.org Reland "Refactoring of the noise suppressor and adding true multichannel support"

Created with:
  gclient setdep -r src/third_party/webrtc@fb075d558d6d

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/webrtc-chromium-autoroll
Please CC webrtc-chromium-sheriffs-robots@google.com on the revert to ensure that a human
is aware of the problem.

To report a problem with the AutoRoller itself, please file a bug:
https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

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

Bug: chromium:None,chromium:b/143344262
Change-Id: I45e86468803b97b484359ce81d16049776deffd5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1893397Reviewed-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@{#711309}

DEPS

@@ -1512,7 +1512,7 @@ deps = {
     Var('chromium_git') + '/external/khronosgroup/webgl.git' + '@' + 'dd55f3ca8f2ea716ca917a4aaf36f0729fe902b1',
 
   'src/third_party/webrtc':
-    Var('webrtc_git') + '/src.git' + '@' + '159b417c98270f3c134c32d3d5fe763e2221ff8c',
+    Var('webrtc_git') + '/src.git' + '@' + 'fb075d558d6dbcda3392cfec05fdbe2cc06f9292',
 
   # Wuffs' canonical repository is at github.com/google/wuffs, but we use
   # Skia's mirror of Wuffs, the same as in upstream Skia's DEPS file.