ui: Cleanup class/struct forward declarations

ui/app_list/views/contents_view.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 UI_APP_LIST_VIEWS_CONTENTS_VIEW_H_
 #define UI_APP_LIST_VIEWS_CONTENTS_VIEW_H_
 
 #include <map>
 #include <memory>
 #include <utility>
@@ skipping 12 matching lines @@
 class Rect;
 }
 
 namespace app_list {
 
 class AppsGridView;
 class AppListPage;
 class ApplicationDragAndDropHost;
 class AppListFolderItem;
 class AppListMainView;
-class AppListViewDelegate;
 class AppsContainerView;
 class CustomLauncherPageView;
-class ContentsAnimator;
 class PaginationModel;
 class SearchBoxView;
 class SearchResultPageView;
 class StartPageView;
 
 // A view to manage launcher pages within the Launcher (eg. start page, apps
 // grid view, search results). There can be any number of launcher pages, only
 // one of which can be active at a given time. ContentsView provides the user
 // interface for switching between launcher pages, and animates the transition
 // between them.
@@ skipping 154 matching lines @@
 
   // Manages the pagination for the launcher pages.
   PaginationModel pagination_model_;
 
   DISALLOW_COPY_AND_ASSIGN(ContentsView);
 };
 
 }  // namespace app_list
 
 #endif  // UI_APP_LIST_VIEWS_CONTENTS_VIEW_H_