Chromestatus links: https://www.chromestatus.com/metrics/feature/timeline/popularity/1955 https://www.chromestatus.com/metrics/feature/timeline/popularity/1956.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/aa4131d301e2353a932e7adcddedbd64cea14664

commit aa4131d301e2353a932e7adcddedbd64cea14664
Author: Max Morin <maxmorin@chromium.org>
Date: Wed Jun 13 17:50:59 2018

Remove implementation of googBeamforming.

Removes the implementation, leaves the web-facing stuff.

Bug:  851940 , 851959
Change-Id: I9a7ef1f14ecd67a6d56d7f63bf35c16813ee626c
Reviewed-on: https://chromium-review.googlesource.com/1097134
Reviewed-by: Guido Urdaneta <guidou@chromium.org>
Commit-Queue: Max Morin <maxmorin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#566899}
[modify] https://crrev.com/aa4131d301e2353a932e7adcddedbd64cea14664/content/renderer/media/stream/media_stream_audio_processor.cc
[modify] https://crrev.com/aa4131d301e2353a932e7adcddedbd64cea14664/content/renderer/media/stream/media_stream_audio_processor_unittest.cc

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/0ab64718fc3ad72ce22b284ab1c0791c2ba4cfc8

commit 0ab64718fc3ad72ce22b284ab1c0791c2ba4cfc8
Author: Max Morin <maxmorin@chromium.org>
Date: Mon Jun 25 17:51:59 2018

Remove googBeamforming and googArrayGeometry.

Drive-by fix some lint.

Bug:  851940 ,  856176 
Change-Id: Ia42c0902b58cd278afc2c4703a50982204ef75b8
Reviewed-on: https://chromium-review.googlesource.com/1099235
Commit-Queue: Max Morin <maxmorin@chromium.org>
Reviewed-by: Guido Urdaneta <guidou@chromium.org>
Reviewed-by: Philip Jägenstedt <foolip@chromium.org>
Cr-Commit-Position: refs/heads/master@{#570088}
[modify] https://crrev.com/0ab64718fc3ad72ce22b284ab1c0791c2ba4cfc8/content/renderer/media/stream/media_stream_audio_processor.cc
[modify] https://crrev.com/0ab64718fc3ad72ce22b284ab1c0791c2ba4cfc8/content/renderer/media/stream/media_stream_audio_processor_options.cc
[modify] https://crrev.com/0ab64718fc3ad72ce22b284ab1c0791c2ba4cfc8/content/renderer/media/stream/media_stream_audio_processor_options.h
[modify] https://crrev.com/0ab64718fc3ad72ce22b284ab1c0791c2ba4cfc8/content/renderer/media/stream/media_stream_constraints_util_audio.cc
[modify] https://crrev.com/0ab64718fc3ad72ce22b284ab1c0791c2ba4cfc8/content/renderer/media/stream/media_stream_constraints_util_audio_unittest.cc
[modify] https://crrev.com/0ab64718fc3ad72ce22b284ab1c0791c2ba4cfc8/content/renderer/media/stream/mock_constraint_factory.cc
[modify] https://crrev.com/0ab64718fc3ad72ce22b284ab1c0791c2ba4cfc8/content/renderer/media/stream/user_media_client_impl_unittest.cc
[modify] https://crrev.com/0ab64718fc3ad72ce22b284ab1c0791c2ba4cfc8/media/base/audio_point.cc
[modify] https://crrev.com/0ab64718fc3ad72ce22b284ab1c0791c2ba4cfc8/media/base/audio_point.h
[modify] https://crrev.com/0ab64718fc3ad72ce22b284ab1c0791c2ba4cfc8/media/base/audio_point_unittest.cc
[modify] https://crrev.com/0ab64718fc3ad72ce22b284ab1c0791c2ba4cfc8/third_party/blink/public/platform/web_media_constraints.h
[modify] https://crrev.com/0ab64718fc3ad72ce22b284ab1c0791c2ba4cfc8/third_party/blink/renderer/modules/mediastream/media_constraints_impl.cc
[modify] https://crrev.com/0ab64718fc3ad72ce22b284ab1c0791c2ba4cfc8/third_party/blink/renderer/modules/mediastream/user_media_request.cc
[modify] https://crrev.com/0ab64718fc3ad72ce22b284ab1c0791c2ba4cfc8/third_party/blink/renderer/platform/exported/web_media_constraints.cc

The (very little) remaining work is blocked on  issue 856176 . This issue is dealt with enough to not block the APM work, so lowering priority.

I think we can close this, since for practical purposes they have been removed.
Actual removal will come when we remove support for the old constraints syntax in getUserMedia().

SGTM