Remove camera and microphone settings from the extensions API.
These were added in CLs
880223002 and
889893002.
Automatic revert in CLs
925303003 and
933273002 didn't work due to the way how kContentSettingsTypeNames in content_settings_helpers.cc works - we cannot remove an entry from the middle of the list.
Reason for revert:
Setting the camera and microphone default content settings currently cannot be shown in the UI and will not work exactly the way an app developer might expect it to (due to interference with the MEDIASTREAM content setting).
Reverting this patch until the UI is ready.
BUG=464410
Review URL: https://codereview.chromium.org/
938513004
Cr-Commit-Position: refs/heads/master@{#319286}