Ensure privet notifications don't appear on device removal

Do not show new notifications when a device is removed.

BUG=336890

Review URL: https://codereview.chromium.org/144093015

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@246530 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 246530
Files.app: Fix commands needing an entry.

Some commands in Files.app pick an entry from navigation list items.
The items should have entry property.

BUG=336697
TEST=manually

Review URL: https://codereview.chromium.org/144653002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@246531 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 246531