Roll WebRTC from ba3893477163 to f5770a0198bf (3 revisions)

https://webrtc.googlesource.com/src.git/+log/ba3893477163..f5770a0198bf

2022-01-12 perkj@webrtc.org Replace RTC_DCHECK_NOT_REACHED in framegenerator implementations of
2022-01-12 nisse@webrtc.org Update api/ to not use implicit T* --> scoped_refptr<T> conversion
2022-01-12 jleconte@webrtc.org Revert of flag simplification.

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 file a bug in WebRTC: https://bugs.chromium.org/p/webrtc/issues/entry
To file a bug in Chromium: https://bugs.chromium.org/p/chromium/issues/entry

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/main/autoroll/README.md

Bug: None
Tbr: webrtc-chromium-sheriffs-robots@google.com
Change-Id: Id014f41369498612b5fe2186ec090582e35660a5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3383235
Commit-Queue: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Bot-Commit: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/main@{#958134}