Roll src/third_party/webrtc 2d2c2947fd50..39fb817efdce (2 commits)

https://webrtc.googlesource.com/src.git/+log/2d2c2947fd50..39fb817efdce

git log 2d2c2947fd50..39fb817efdce --date=short --first-parent --format='%ad %ae %s'
2020-04-14 ilnik@webrtc.org [Video, Svc] Remove inactive spatial layers in codec initializer
2020-04-14 mbonadei@webrtc.org Remove OpenSSLIdentity::GenerateWithExpiration.

Created with:
  gclient setdep -r src/third_party/webrtc@39fb817efdce

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: I2ed25d5977161b999614ac363abae8045e95672b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2148725Reviewed-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@{#758845}

DEPS

@@ -1465,7 +1465,7 @@ deps = {
   },
 
   'src/third_party/webrtc':
-    Var('webrtc_git') + '/src.git' + '@' + '2d2c2947fd5026e9723a7243790da2f446428ce0',
+    Var('webrtc_git') + '/src.git' + '@' + '39fb817efdce6fa79e7f9f50772288459f1b2d98',
 
   'src/third_party/libgifcodec':
      Var('skia_git') + '/libgifcodec' + '@'+  Var('libgifcodec_revision'),