Make old task manager tests work against new task manager.

chrome/browser/ui/views/new_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_NEW_TASK_MANAGER_VIEW_H_
 #define CHROME_BROWSER_UI_VIEWS_NEW_TASK_MANAGER_VIEW_H_
 
 #include <vector>
 
 #include "base/macros.h"
@@ skipping 26 matching lines @@
       public views::ButtonListener,
       public views::DialogDelegateView,
       public views::TableGrouper,
       public views::TableViewObserver,
       public views::ContextMenuController,
       public ui::SimpleMenuModel::Delegate {
  public:
   ~NewTaskManagerView() override;
 
   // Shows the Task Manager window, or re-activates an existing one.
-  static void Show(Browser* browser);
+  static task_management::TaskManagerTableModel* Show(Browser* browser);
 
   // Hides the Task Manager if it is showing.
   static void Hide();
 
   // task_management::TableViewDelegate:
   bool IsColumnVisible(int column_id) const override;
   void SetColumnVisibility(int column_id, bool new_visibility) override;
   bool IsTableSorted() const override;
   TableSortDescriptor GetSortDescriptor() const override;
   void ToggleSortOrder(int visible_column_index) override;
@@ skipping 74 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(NewTaskManagerView);
 };
 
 }  // namespace task_management
 
 #endif  // CHROME_BROWSER_UI_VIEWS_NEW_TASK_MANAGER_VIEW_H_