Updated ownership of NavigationItems within CRWSessionController.

ios/web/public/navigation_item_list.h

 // Copyright 2017 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 IOS_WEB_PUBLIC_NAVIGATION_ITEM_LIST_H_
 #define IOS_WEB_PUBLIC_NAVIGATION_ITEM_LIST_H_
 
 #include <memory>
 #include <vector>
 
 namespace web {
 
 class NavigationItem;
 
 // Convenience typedef for a list of raw NavigationItem pointers.
 // TODO(crbug.com/689321): Clean up these typedefs.
 typedef std::vector<NavigationItem*> NavigationItemList;
 
 // Convenience typedef for a list of scoped NavigationItem pointers.
 typedef std::vector<std::unique_ptr<NavigationItem>> ScopedNavigationItemList;
 
-// Returns a NavigationItemList populated with raw pointer values from
-// |scoped_list|.
-NavigationItemList CreateRawNavigationItemList(
-    const ScopedNavigationItemList& scoped_list);
-
 }  // namespace web
 
 #endif  // IOS_WEB_PUBLIC_NAVIGATION_ITEM_LIST_H_