mash: Migrate ScopedTargetRootWindow to //ash/common

ash/shelf/shelf_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 ASH_SHELF_SHELF_VIEW_H_
 #define ASH_SHELF_SHELF_VIEW_H_
 
 #include <memory>
 #include <string>
 #include <utility>
@@ skipping 24 matching lines @@
 class BoundsAnimator;
 class MenuModelAdapter;
 class MenuRunner;
 }
 
 namespace ash {
 class AppListButton;
 class DragImageView;
 class OverflowBubble;
 class OverflowButton;
-class ScopedTargetRootWindow;
+class ScopedRootWindowForNewWindows;
 class Shelf;
 class ShelfButton;
 class ShelfDelegate;
 class ShelfIconObserver;
 class ShelfModel;
 struct ShelfItem;
 class WmShelf;
 
 namespace test {
 class ShelfViewTestAPI;
@@ skipping 334 matching lines @@
 
   // Used for the context menu of a particular item.
   ShelfID context_menu_id_;
 
   std::unique_ptr<views::FocusSearch> focus_search_;
 
   // Manages the context menu, and the list menu.
   std::unique_ptr<ui::MenuModel> menu_model_;
   std::unique_ptr<views::MenuModelAdapter> menu_model_adapter_;
   std::unique_ptr<views::MenuRunner> launcher_menu_runner_;
-  std::unique_ptr<ScopedTargetRootWindow> scoped_target_root_window_;
+  std::unique_ptr<ScopedRootWindowForNewWindows>
+      scoped_root_window_for_new_windows_;
 
   base::ObserverList<ShelfIconObserver> observers_;
 
   // Amount content is inset on the left edge (or top edge for vertical
   // alignment).
   int leading_inset_;
 
   ShelfGestureHandler gesture_handler_;
 
   // True when an item being inserted or removed in the model cancels a drag.
@@ skipping 56 matching lines @@
 
   // Tracks UMA metrics based on shelf button press actions.
   ShelfButtonPressedMetricTracker shelf_button_pressed_metric_tracker_;
 
   DISALLOW_COPY_AND_ASSIGN(ShelfView);
 };
 
 }  // namespace ash
 
 #endif  // ASH_SHELF_SHELF_VIEW_H_