GitLab

Stopping using DiskChanged event for mount/unmount event processing in FileBrowserEventRouter and some bug fixes.

UnmountPath now expects mount_path to be passed to it.

Hiding device notification when disk added event is triggered instead when some
device is mounted (notification handleing needs some more work).

Fixed chromium-os:18339 and chromium-os:17777


BUG=chromium-os:18399, chromium-os:17531, chromium-os:17777
TEST=Made sure FileBrowser works as expected on Cr48.
Review URL: http://codereview.chromium.org/7466046

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@96419 0039d316-1c4b-4281-b951-d872f2087c98