Don't show system notifications while the screen is locked.

chrome/browser/chromeos/notifications/system_notification.h

 // Copyright (c) 2012 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_CHROMEOS_NOTIFICATIONS_SYSTEM_NOTIFICATION_H_
 #define CHROME_BROWSER_CHROMEOS_NOTIFICATIONS_SYSTEM_NOTIFICATION_H_
 #pragma once
 
 #include <string>
 
 #include "base/compiler_specific.h"
 #include "base/basictypes.h"
 #include "base/string16.h"
 #include "chrome/browser/chromeos/notifications/balloon_view_host_chromeos.h"  // MessageCallback
 #include "chrome/browser/notifications/notification_delegate.h"
+#include "chromeos/dbus/power_manager_client.h"
 #include "googleurl/src/gurl.h"
 
+class Notification;
 class Profile;
 
 namespace chromeos {
 
 class BalloonCollectionImplAura;
 typedef class BalloonCollectionImplAura BalloonCollectionImplType;
 
 // The system notification object handles the display of a system notification
 
-class SystemNotification {
+class SystemNotification : public PowerManagerClient::Observer {
  public:
   // The profile is the current user profile. The id is any string used
   // to uniquely identify this notification. The title is the title of
   // the message to be displayed. On creation, the message is hidden.
   SystemNotification(Profile* profile,
                      const std::string& id,
                      int icon_resource_id,
                      const string16& title);
 
   // Allows to provide custom NotificationDelegate.
   SystemNotification(Profile* profile,
                      NotificationDelegate* delegate,
                      int icon_resource_id,
                      const string16& title);
 
   virtual ~SystemNotification();
 
+  // PowerManagerClient::Observer override.
+  virtual void UnlockScreen() OVERRIDE;
+
   void set_title(const string16& title) { title_ = title; }
 
   // Show will show or update the message for this notification
   // on a transition to urgent, the notification will be shown if it was
   // previously hidden or minimized by the user.
   void Show(const string16& message, bool urgent, bool sticky);
 
   // Same as Show() above with a footer link at the bottom and a callback
   // for when the link is clicked.
   void Show(const string16& message, const string16& link_text,
@@ skipping 20 matching lines @@
     virtual void Click() OVERRIDE {}
     virtual std::string id() const OVERRIDE;
 
    private:
     std::string id_;
 
     DISALLOW_COPY_AND_ASSIGN(Delegate);
   };
 
   void Init(int icon_resource_id);
+  void ShowNotification(const Notification& notify);
 
   Profile* profile_;
   BalloonCollectionImplType* collection_;
   scoped_refptr<NotificationDelegate> delegate_;
+  string16 message_;
+  string16 link_;
+  BalloonViewHost::MessageCallback callback_;
   GURL icon_;
   string16 title_;
   bool visible_;
+  bool sticky_;
   bool urgent_;
+  bool show_on_unlock_;
 
   DISALLOW_COPY_AND_ASSIGN(SystemNotification);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_NOTIFICATIONS_SYSTEM_NOTIFICATION_H_