mash: Remove last WmWindow uses in ash/shelf.

ash/shelf/shelf_controller.cc

 // Copyright 2016 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.
 
 #include "ash/shelf/shelf_controller.h"
 
 #include "ash/public/interfaces/shelf.mojom.h"
 #include "ash/root_window_controller.h"
 #include "ash/session/session_controller.h"
 #include "ash/shelf/app_list_shelf_item_delegate.h"
 #include "ash/shelf/shelf.h"
 #include "ash/shell.h"
-#include "ash/wm_window.h"
 #include "base/strings/utf_string_conversions.h"
 #include "ui/base/models/simple_menu_model.h"
 #include "ui/display/display.h"
 #include "ui/display/screen.h"
 
 namespace ash {
 
 namespace {
 
 // Returns the Shelf instance for the display with the given |display_id|.
@@ skipping 84 matching lines @@
 void ShelfController::UnpinItem(const std::string& app_id) {
   NOTIMPLEMENTED();
 }
 
 void ShelfController::SetItemImage(const std::string& app_id,
                                    const SkBitmap& image) {
   NOTIMPLEMENTED();
 }
 
 }  // namespace ash