Get rid of full paths from directory_tree.js.

This patch finalizes removing full paths from the directory tree, and uses the volume manager and its getLocationInfo() instead.

TEST=Tested manually. Partly browser tests.
BUG=325052
R=yoshiki@chromium.org

Review URL: https://codereview.chromium.org/136543003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@245887 0039d316-1c4b-4281-b951-d872f2087c98
Adding Bluetooth support to media in Chrome.

Adds:
- support for device enumeration/detection of a connected BT headset, and
- support for routing audio to the BT SCO audio channel

BUG=324464
TEST=https://simpl.info/getusermedia/sources/ and manual unittests in media using a Plantronics BT headset.
R=bulach@chromium.org, tommi@chromium.org

Review URL: https://codereview.chromium.org/116163007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@245888 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 245888