Cleanup: Remove unneeded forward declarations from various chrome/browser subdirectories.

chrome/browser/notifications/notification_ui_manager.h

 // Copyright (c) 2011 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_NOTIFICATION_UI_MANAGER_H_
 #define CHROME_BROWSER_NOTIFICATIONS_NOTIFICATION_UI_MANAGER_H_
 #pragma once
 
 #include <deque>
 #include <string>
+#include <vector>
 
 #include "base/id_map.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/timer.h"
 #include "chrome/browser/notifications/balloon.h"
 #include "chrome/browser/notifications/balloon_collection.h"
 #include "chrome/browser/prefs/pref_member.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 
 class Notification;
 class PrefService;
 class Profile;
 class QueuedNotification;
-class SiteInstance;
 
 // The notification manager manages use of the desktop for notifications.
 // It maintains a queue of pending notifications when space becomes constrained.
 class NotificationUIManager
     : public BalloonCollection::BalloonSpaceChangeListener,
       public content::NotificationObserver {
  public:
   virtual ~NotificationUIManager();
 
   // Creates an initialized UI manager with a new balloon collection
@@ skipping 87 matching lines @@
   IntegerPrefMember position_pref_;
 
   // Used by screen-saver and full-screen handling support.
   bool is_user_active_;
   base::RepeatingTimer<NotificationUIManager> user_state_check_timer_;
 
   DISALLOW_COPY_AND_ASSIGN(NotificationUIManager);
 };
 
 #endif  // CHROME_BROWSER_NOTIFICATIONS_NOTIFICATION_UI_MANAGER_H_