Revert "Updated ownership of NavigationItems within CRWSessionController."

ios/web/public/navigation_item_list.h

Index: ios/web/public/navigation_item_list.h
diff --git a/ios/web/public/navigation_item_list.h b/ios/web/public/navigation_item_list.h
index ed8a28a3e8026335976f554688faec3f081d7564..c922a13ab7183eb57c809c57da9e7df4d3cc4964 100644
--- a/ios/web/public/navigation_item_list.h
+++ b/ios/web/public/navigation_item_list.h
@@ -19,6 +19,11 @@ 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_