Roll WebRTC from b33a7186e6ab to a474fbf41353 (12 revisions)

https://webrtc.googlesource.com/src.git/+log/b33a7186e6ab..a474fbf41353

2020-10-02 hta@webrtc.org Move more functions called only in sdp_offer_answer into that file.
2020-10-02 elrello@microsoft.com Add a test to show that H264FmtpSpsPpsIdrInKeyframe parameter is not present in generated SDP
2020-10-02 marinaciocea@webrtc.org [Sheriff] Revert "Remove MessageHandler[AutoCleanup] dependency from StreamInterface."
2020-10-02 saza@webrtc.org AEC3: Move option for reverb model in nonlinaer mode into AEC3 config
2020-10-02 tommi@webrtc.org Convert LS_VERBOSE and LS_INFO logs in OpenSSLStreamAdapter to DLOG
2020-10-02 chromium-webrtc-autoroll@webrtc-ci.iam.gserviceaccount.com Roll chromium_revision 7d9183ce..d4fe6f2b (813111:813271)
2020-10-02 sprang@webrtc.org Cleans up code related to early loss detection flag.
2020-10-02 sprang@webrtc.org Adds field trial to set per-layer speed for libvpx vp9.
2020-10-02 philipel@webrtc.org Set processing time according to the decode time if provided by the decoder.
2020-10-02 terelius@webrtc.org Add method to extract triage alerts from RTC event log analyzer.
2020-10-02 olka@webrtc.org Async audio processing API
2020-10-02 tommi@webrtc.org Remove MessageHandler[AutoCleanup] dependency from StreamInterface.

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: None
Tbr: webrtc-chromium-sheriffs-robots@google.com
Change-Id: I6e72cf641f0dabea974068c098dbbba3c30f1e02
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2445581Reviewed-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@{#813468}

DEPS

@@ -1486,7 +1486,7 @@ deps = {
   },
 
   'src/third_party/webrtc':
-    Var('webrtc_git') + '/src.git' + '@' + 'b33a7186e6ab94f3cc77d82e6d6de08350fbb232',
+    Var('webrtc_git') + '/src.git' + '@' + 'a474fbf41353ac752280181e3c548a606ca5c53c',
 
   'src/third_party/libgifcodec':
      Var('skia_git') + '/libgifcodec' + '@'+  Var('libgifcodec_revision'),