Display the requested devices in disabled menus when the page is controlling which device to use.

The chromium omnibox UI for selecting capture devices won't take any effect if the page is selecting device via JS code.
We should not show the device selection menus in such case, instead, disable the menus and show the requested devices.

new screenshot on of the bubble on Mac
http://i.imgur.com/HpF8bxL.png

BUG=262788
TEST=go to https://x20web.corp.google.com/~tommi/Device%20enumeration%20API.html start audio and video, no device selection on the omnibox.
R=bauerb@chromium.org, erg@chromium.org, markusheintz@chromium.org, pkasting@chromium.org

Review URL: https://codereview.chromium.org/23812011

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@224970 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 224970