chrome: Cleanup class/struct forward declarations

chrome/browser/ui/views/task_manager_view.h

 // Copyright 2015 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_UI_VIEWS_TASK_MANAGER_VIEW_H_
 #define CHROME_BROWSER_UI_VIEWS_TASK_MANAGER_VIEW_H_
 
 #include <vector>
 
 #include "base/macros.h"
 #include "chrome/browser/ui/task_manager/task_manager_table_model.h"
 #include "ui/base/models/simple_menu_model.h"
 #include "ui/base/models/table_model.h"
 #include "ui/views/context_menu_controller.h"
 #include "ui/views/controls/menu/menu_runner.h"
 #include "ui/views/controls/table/table_grouper.h"
 #include "ui/views/controls/table/table_view_observer.h"
 #include "ui/views/window/dialog_delegate.h"
 
 class Browser;
 
 namespace views {
-class Link;
 class TableView;
 class View;
 }  // namespace views
 
 namespace task_manager {
 
 // The new task manager UI container.
 class TaskManagerView : public TableViewDelegate,
                         public views::DialogDelegateView,
                         public views::TableGrouper,
@@ skipping 92 matching lines @@
 
   // True when the Task Manager window should be shown on top of other windows.
   bool is_always_on_top_;
 
   DISALLOW_COPY_AND_ASSIGN(TaskManagerView);
 };
 
 }  // namespace task_manager
 
 #endif  // CHROME_BROWSER_UI_VIEWS_TASK_MANAGER_VIEW_H_