Only turn on the audio processing by default for MEDIA_DEVICE_AUDIO_CAPTURE.

Then other clients of MEDIA_TAB_AUDIO_CAPTURE, MEDIA_TAB_VIDEO_CAPTURE, MEDIA_LOOPBACK_AUDIO_CAPTURE won't have the audio processing unless the users explicitly turn on the constraints.

NOTRY=true

BUG=264611

Review URL: https://codereview.chromium.org/190713004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@255975 0039d316-1c4b-4281-b951-d872f2087c98
6 files changed