Cleanup: Remove unneeded headers from app/ (part 2)

chrome/browser/views/notifications/balloon_view.h

 // Copyright (c) 2010 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.
 
 // Draws the view for the balloons.
 
 #ifndef CHROME_BROWSER_VIEWS_NOTIFICATIONS_BALLOON_VIEW_H_
 #define CHROME_BROWSER_VIEWS_NOTIFICATIONS_BALLOON_VIEW_H_
 #pragma once
 
@@ skipping 21 matching lines @@
 class ImagePainter;
 class TextButton;
 class WidgetWin;
 class Menu2;
 }  // namespace views
 
 class BalloonCollection;
 class NotificationDetails;
 class NotificationOptionsMenuModel;
 class NotificationSource;
-class SlideAnimation;
 
 // A balloon view is the UI component for a desktop notification toasts.
 // It draws a border, and within the border an HTML renderer.
 class BalloonViewImpl : public BalloonView,
                         public views::View,
                         public views::ViewMenuDelegate,
                         public views::WidgetDelegate,
                         public views::ButtonListener,
                         public NotificationObserver,
                         public AnimationDelegate {
@@ skipping 110 matching lines @@
   scoped_ptr<NotificationOptionsMenuModel> options_menu_model_;
   scoped_ptr<views::Menu2> options_menu_menu_;
   views::MenuButton* options_menu_button_;
 
   NotificationRegistrar notification_registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(BalloonViewImpl);
 };
 
 #endif  // CHROME_BROWSER_VIEWS_NOTIFICATIONS_BALLOON_VIEW_H_