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

chrome/browser/notifications/notification_prefs_manager.cc

 // 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.
 
 #include "chrome/browser/notifications/notification_prefs_manager.h"
 
 #include "base/prefs/pref_registry_simple.h"
 #include "base/prefs/pref_service.h"
 #include "chrome/common/pref_names.h"
 
 NotificationPrefsManager::NotificationPrefsManager(PrefService* prefs) {
 #if defined(OS_CHROMEOS)
   static bool have_cleared = false;
 
   if (!have_cleared) {
     // Option menu for changing desktop notification position on ChromeOS is
     // disabled. Force preference to default.
     prefs->ClearPref(prefs::kDesktopNotificationPosition);
     have_cleared = true;
   }
 #endif
 }
 
 // static
 void NotificationPrefsManager::RegisterPrefs(PrefRegistrySimple* registry) {
   registry->RegisterIntegerPref(prefs::kDesktopNotificationPosition,
                                 BalloonCollection::DEFAULT_POSITION);
+  registry->RegisterBooleanPref(prefs::kMessageCenterShowedFirstRunBalloon,
+                                false);
 }