Roll src/third_party/webrtc e759fbcfd117..dfae553e3a69 (1 commits)

https://webrtc.googlesource.com/src.git/+log/e759fbcfd117..dfae553e3a69

git log e759fbcfd117..dfae553e3a69 --date=short --first-parent --format='%ad %ae %s'
2020-04-08 alito@webrtc.org Delete unused class MedianSlopeEstimator

Created with:
  gclient setdep -r src/third_party/webrtc@dfae553e3a69

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: Ib03713530b67388727dedf32c811c15aafd520c9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2141843Reviewed-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@{#757379}

DEPS

@@ -1465,7 +1465,7 @@ deps = {
   },
 
   'src/third_party/webrtc':
-    Var('webrtc_git') + '/src.git' + '@' + 'e759fbcfd117f8299267efb14272427b33d09c19',
+    Var('webrtc_git') + '/src.git' + '@' + 'dfae553e3a6928c9cf71121650bd4b605c359587',
 
   'src/third_party/libgifcodec':
      Var('skia_git') + '/libgifcodec' + '@'+  Var('libgifcodec_revision'),