Roll src/third_party/webrtc f87536c9de24..4e1d6ce38422 (4 commits)

https://webrtc.googlesource.com/src.git/+log/f87536c9de24..4e1d6ce38422

git log f87536c9de24..4e1d6ce38422 --date=short --first-parent --format='%ad %ae %s'
2020-03-09 danilchap@webrtc.org Rename java VideoCodecType to VideoCodecMimeType
2020-03-09 phoglund@webrtc.org Purge phoglund from most OWNERS files.
2020-03-09 brandtr@webrtc.org Add |rids| and |mid| printout to RtpConfig::ToString().
2020-03-09 ilnik@webrtc.org Wire up internal libvpx VP9 scaler to statistics proxy

Created with:
  gclient setdep -r src/third_party/webrtc@4e1d6ce38422

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

Bug: None
Tbr: webrtc-chromium-sheriffs-robots@google.com
Change-Id: I2aa7a3f27f170784408bfc6e03015d4961d31d1a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2095420Reviewed-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@{#748363}

DEPS

@@ -1454,7 +1454,7 @@ deps = {
     Var('chromium_git') + '/external/github.com/gpuweb/cts.git' + '@' + 'ec18cc3262922e7dcdbe70243c6f40606f979144',
 
   'src/third_party/webrtc':
-    Var('webrtc_git') + '/src.git' + '@' + 'f87536c9de24ce25c398c1f7a413dc8b80208362',
+    Var('webrtc_git') + '/src.git' + '@' + '4e1d6ce3842277fab93bd16ec73e36d635e5d6e0',
 
   'src/third_party/libgifcodec':
      Var('skia_git') + '/libgifcodec' + '@'+  Var('libgifcodec_revision'),