Fix formatting of M-SEARCH to add spaces.
Set MX to 1.

BUG=232494,326624
TESTED=Manually via Wireshark

Review URL: https://codereview.chromium.org/109063002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@239720 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 239720
Forces HasPopupNotifications() to return false if message center is shown.

When the message center is shown, usually all notifications are
marked as 'shown_as_popup', so HasPopupNotifications() will return
false then.

System notifications are exceptional though. They are never marked
as 'shown_as_popup' to appear always, and HasPopupNotifications()
returns true even though no popups are shown. This will cause a
crash of a tricky code path.

BUG=305834
R=dewittj@chromium.org
TEST=manually

Review URL: https://codereview.chromium.org/109293002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@239721 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 239721