Adds a first-run balloon to the Windows notification center.

chrome/browser/notifications/message_center_notification_manager.h

Index: chrome/browser/notifications/message_center_notification_manager.h
diff --git a/chrome/browser/notifications/message_center_notification_manager.h b/chrome/browser/notifications/message_center_notification_manager.h
index ae5fc9ad0e1c4e098c128d839817c872c93375c7..23ceecfb7456bf491eb7e7eef55aab8dfe40ad2b 100644
--- a/chrome/browser/notifications/message_center_notification_manager.h
+++ b/chrome/browser/notifications/message_center_notification_manager.h
@@ -9,6 +9,9 @@
 #include <string>
 
 #include "base/memory/scoped_ptr.h"
+#include "base/memory/weak_ptr.h"
+#include "base/prefs/pref_member.h"
+#include "base/timer.h"
 #include "chrome/browser/notifications/notification.h"
 #include "chrome/browser/notifications/notification_ui_manager.h"
 #include "chrome/browser/notifications/notification_ui_manager_impl.h"
@@ -18,19 +21,26 @@
 
 class MessageCenterSettingsController;
 class Notification;
+class PrefService;
 class Profile;
 
 // This class extends NotificationUIManagerImpl and delegates actual display
-// of notifications to MessageCenter, doing necessary conversions.
+// of notifications to MessageCenter, doing necessary conversions.  Supports
+// weak pointers for reliable lifetime in timer callbacks.
 class MessageCenterNotificationManager
     : public NotificationUIManagerImpl,
       public message_center::MessageCenter::Delegate,
-      public message_center::MessageCenterObserver {
+      public message_center::MessageCenterObserver,
+      public base::SupportsWeakPtr<MessageCenterNotificationManager> {

[Andrew T Wilson (Slow), 2013/06/19 06:28:57]

Unless external classes need to be able to create WeakPtrs for your class, I
prefer using an internal WeakPtrFactory instead of inheriting from
SupportsWeakPtr<>.

[dewittj, 2013/06/20 02:20:54]

Done.

  public:
   explicit MessageCenterNotificationManager(
-      message_center::MessageCenter* message_center);
+      message_center::MessageCenter* message_center,
+      PrefService* local_state);
   virtual ~MessageCenterNotificationManager();
 
+  // Called when the pref changes for the first run balloon.
+  void DisplayFirstRunBalloon();
+
   // NotificationUIManager
   virtual bool DoesIdExist(const std::string& notification_id) OVERRIDE;
   virtual bool CancelById(const std::string& notification_id) OVERRIDE;
@@ -59,6 +69,8 @@ class MessageCenterNotificationManager
   virtual void OnNotificationRemoved(const std::string& notification_id,
                                      bool by_user) OVERRIDE;
   virtual void OnNotificationCenterClosed() OVERRIDE;
+  virtual void OnNotificationUpdated(const std::string& notification_id)
+      OVERRIDE;
 
  private:
   class ImageDownloadsObserver {
@@ -171,6 +183,19 @@ class MessageCenterNotificationManager
   // notification is found.
   ProfileNotification* FindProfileNotification(const std::string& id) const;
 
+  // This function is run on update to ensure that the notification balloon is
+  // shown only when there are no popups present.
+  void CheckFirstRunTimer();
+
+  // |first_run_pref_| is used to keep track of whether we've ever shown the
+  // first run balloon before, even across restarts.
+  BooleanPrefMember first_run_pref_;
+
+  // The timer after which we will show the first run balloon.  This timer is
+  // restarted every time the message center is closed and every time the last
+  // popup disappears from the screen.
+  base::OneShotTimer<MessageCenterNotificationManager> first_run_balloon_timer_;
+
   DISALLOW_COPY_AND_ASSIGN(MessageCenterNotificationManager);
 };