Roll WebRTC from 7f7fb830ba42 to 8b7cfa16aa2f (4 revisions)

https://webrtc.googlesource.com/src.git/+log/7f7fb830ba42..8b7cfa16aa2f

2020-06-04 mbonadei@webrtc.org Introduce absl_deps in rtc_* C++ templates.
2020-06-04 tommi@webrtc.org Remove dependency from RtpRtcp on the Module interface.
2020-06-04 eshr@google.com Clean resource_adaptation_processor_unittest use of TaskQueueForTest
2020-06-04 danilchap@webrtc.org Add Scalability structure tests for individual frame configurations

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/+doc/master/autoroll/README.md

Bug: chromium:1046390
Tbr: webrtc-chromium-sheriffs-robots@google.com
Change-Id: I3013eec78a38942d18c4794aeb807502279ace16
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2230882Reviewed-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@{#775082}

DEPS

@@ -1452,7 +1452,7 @@ deps = {
   },
 
   'src/third_party/webrtc':
-    Var('webrtc_git') + '/src.git' + '@' + '7f7fb830ba42156be3c7d3f8c5ae40bbf463a446',
+    Var('webrtc_git') + '/src.git' + '@' + '8b7cfa16aa2f07a5cd41ed3c7e1ae975a2b8d1f2',
 
   'src/third_party/libgifcodec':
      Var('skia_git') + '/libgifcodec' + '@'+  Var('libgifcodec_revision'),