Supports window teleports for notifications.

chrome/browser/ui/ash/multi_user/multi_user_notification_blocker_chromeos.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef CHROME_BROWSER_NOTIFICATIONS_MULTI_USER_NOTIFICATION_BLOCKER_CHROMEOS_H_
-#define CHROME_BROWSER_NOTIFICATIONS_MULTI_USER_NOTIFICATION_BLOCKER_CHROMEOS_H_
+#ifndef CHROME_BROWSER_UI_ASH_MULTI_USER_MULTI_USER_NOTIFICATION_BLOCKER_CHROMEOS_H_
+#define CHROME_BROWSER_UI_ASH_MULTI_USER_MULTI_USER_NOTIFICATION_BLOCKER_CHROMEOS_H_
 
 #include <map>
+#include <set>
 #include <string>
 
-#include "ash/shell_observer.h"
-#include "chrome/browser/chromeos/login/user_manager.h"
-#include "chromeos/login/login_state.h"
 #include "ui/message_center/notification_blocker.h"
 
-// A notification blocker for per-profile stream switching.
+// A notification blocker for per-profile stream switching. Owned and controlled
+// by MultiUserWindowManagerChromeOS.
 class MultiUserNotificationBlockerChromeOS
-    : public message_center::NotificationBlocker,
-      public ash::ShellObserver,
-      public chromeos::UserManager::UserSessionStateObserver {
+    : public message_center::NotificationBlocker {
  public:
   explicit MultiUserNotificationBlockerChromeOS(
       message_center::MessageCenter* message_center);
   virtual ~MultiUserNotificationBlockerChromeOS();
 
+  // Checks the current desktop and update the list of users which owns windows
+  // on the current desktop.
+  void UpdateWindowOwners();
+
+  // Called by MultiUserWindowManager when the the active user has changed.

[Mr4D (OOO till 08-26), 2014/01/08 17:29:35]

nit: .. when the active ..

[Jun Mukai, 2014/01/08 20:41:24]

Done.

+  void ActiveUserChanged(const std::string& user_id);
+
   // message_center::NotificationBlocker overrides:
   virtual bool ShouldShowNotification(
       const message_center::NotifierId& notifier_id) const OVERRIDE;
   virtual bool ShouldShowNotificationAsPopup(
       const message_center::NotifierId& notifier_id) const OVERRIDE;
 
-  // ash::ShellObserver overrides:
-  virtual void OnAppTerminating() OVERRIDE;
-
-  // chromeos::UserManager::UserSessionStateObserver overrides:
-  virtual void ActiveUserChanged(const chromeos::User* active_user) OVERRIDE;
-
  private:
   // Returns true if this blocker is actively working.
   bool IsActive() const;
 
   std::string active_user_id_;
-  bool observing_;
   std::map<std::string, bool> quiet_modes_;
+  std::set<std::string> current_user_ids_;
 
   DISALLOW_COPY_AND_ASSIGN(MultiUserNotificationBlockerChromeOS);
 };
 
-#endif  // CHROME_BROWSER_NOTIFICATIONS_MULTI_USER_NOTIFICATION_BLOCKER_CHROMEOS_H_
+#endif  // CHROME_BROWSER_UI_ASH_MULTI_USER_MULTI_USER_NOTIFICATION_BLOCKER_CHROMEOS_H_