[gtk] un-break status bubble.

broken in r71858.

BUG=70244
TEST=manual (in and out of --kiosk)

Review URL: http://codereview.chromium.org/6343003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@71988 0039d316-1c4b-4281-b951-d872f2087c98
void StatusBubbleGtk::Observe(NotificationType type,
                              const NotificationSource& source,
                              const NotificationDetails& details) {
  if (type == NotificationType::BROWSER_THEME_CHANGED) {
    UserChangedTheme();
  }
}

void StatusBubbleGtk::Observe(NotificationType type,
                              const NotificationSource& source,
                              const NotificationDetails& details) {
  if (type == NotificationType::BROWSER_THEME_CHANGED) {
    UserChangedTheme();
  }
}
