Cleanup: Use base namespace in printing/.

Review URL: https://codereview.chromium.org/24989002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@226174 0039d316-1c4b-4281-b951-d872f2087c98
Originally MenuButton can show the empty menu but operating the empty menu by keyboard caused to freeze.
This CL adds a guard and prevents MenuButton from opening the empty menu.

BUG=244300
TEST=manually

Review URL: https://codereview.chromium.org/25211002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@226175 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 226175
chrome://inspect: Disable 'inspect' link for a remote device page if inspector is attached to it from another browser

BUG=None

Review URL: https://codereview.chromium.org/25243002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@226176 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 226176