The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/68e948e58bf16ca64b90a4fcf9e51134f8c1f29a

commit 68e948e58bf16ca64b90a4fcf9e51134f8c1f29a
Author: Marina Ciocea <marinaciocea@chromium.org>
Date: Thu May 10 22:26:17 2018

Switch speech recognition to using audio service input streams.

Use audio service IPC instead of AudioInputController for creating input stream.

This change is part of the effort of moving audio out of browser process [1]. By moving audio
into a separate process, speech recognition can no longer use AudioInputController directly,
and needs to use IPC to create and use input streams provided by audio service.

[1] Chrome audio process design doc: http://doc/12vz7UZBQIp1195V-xAYvHIoQ1r536BCmMKcPN7Si-OI

Bug:  834706 
Cq-Include-Trybots: luci.chromium.try:android_optional_gpu_tests_rel;luci.chromium.try:linux_optional_gpu_tests_rel;luci.chromium.try:mac_optional_gpu_tests_rel;luci.chromium.try:win_optional_gpu_tests_rel
Change-Id: I1dc98ad670e1e9880320ae4bf054ae0d94f5b48f
Reviewed-on: https://chromium-review.googlesource.com/1049685
Commit-Queue: Marina Ciocea <marinaciocea@chromium.org>
Reviewed-by: Nasko Oskov <nasko@chromium.org>
Reviewed-by: Olga Sharonova <olka@chromium.org>
Cr-Commit-Position: refs/heads/master@{#557701}
[modify] https://crrev.com/68e948e58bf16ca64b90a4fcf9e51134f8c1f29a/content/browser/browser_main_loop.cc
[modify] https://crrev.com/68e948e58bf16ca64b90a4fcf9e51134f8c1f29a/content/browser/speech/speech_recognition_browsertest.cc
[modify] https://crrev.com/68e948e58bf16ca64b90a4fcf9e51134f8c1f29a/content/browser/speech/speech_recognition_manager_impl.cc
[modify] https://crrev.com/68e948e58bf16ca64b90a4fcf9e51134f8c1f29a/content/browser/speech/speech_recognition_manager_impl.h
[modify] https://crrev.com/68e948e58bf16ca64b90a4fcf9e51134f8c1f29a/content/browser/speech/speech_recognizer_impl.cc
[modify] https://crrev.com/68e948e58bf16ca64b90a4fcf9e51134f8c1f29a/content/browser/speech/speech_recognizer_impl.h
[modify] https://crrev.com/68e948e58bf16ca64b90a4fcf9e51134f8c1f29a/content/browser/speech/speech_recognizer_impl_unittest.cc

Nothing left to do here, right?

No, it's fixed.