Roll src/third_party/webrtc 52e2dbf1c115..16d0d371d549 (3 commits)

https://webrtc.googlesource.com/src.git/+log/52e2dbf1c115..16d0d371d549

git log 52e2dbf1c115..16d0d371d549 --date=short --first-parent --format='%ad %ae %s'
2020-04-03 mbonadei@webrtc.org Apply performance-for-range-copy fixes.
2020-04-03 tommi@webrtc.org Remove seemingly unused timer
2020-04-03 titovartem@google.com Extract PeerConfigurerImpl into separate file

Created with:
  gclient setdep -r src/third_party/webrtc@16d0d371d549

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: I3a13a527edbb8983551e078e52c4d4782f058cc2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2135787Reviewed-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@{#756265}

DEPS

@@ -1458,7 +1458,7 @@ deps = {
   },
 
   'src/third_party/webrtc':
-    Var('webrtc_git') + '/src.git' + '@' + '52e2dbf1c11578414ffb5b155bf97a84b6ad647f',
+    Var('webrtc_git') + '/src.git' + '@' + '16d0d371d549e17ad5a52d14b32d89850c3f7e14',
 
   'src/third_party/libgifcodec':
      Var('skia_git') + '/libgifcodec' + '@'+  Var('libgifcodec_revision'),