Made renderer-initiated requests registration more reliable.

ios/web/navigation/navigation_manager_util.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_NAVIGATION_NAVIGATION_MANAGER_UTIL_H_
 #define IOS_WEB_NAVIGATION_NAVIGATION_MANAGER_UTIL_H_
 
 // This file contains extensions for web::NavigationManager API without making
 // them part of ios/web/public.
 
 namespace web {
 
 class NavigationItem;
 class NavigationManager;
 
+// Returns transient, committed or pending navigation item with given
+// |unique_id| or null if item is not found. Item's unique id is retrieved via
+// GetUniqueID method.
+NavigationItem* GetItemWithUniqueID(NavigationManager* navigation_manager,
+                                    int unique_id);
+
 // Returns committed navigation item with given |unique_id| or null if item
 // is not found or it is pending or transient. Item's unique id is retrieved
 // via GetUniqueID method.
 NavigationItem* GetCommittedItemWithUniqueID(
     NavigationManager* navigation_manager,
     int unique_id);
 
 // Returns committed navigation item index with given |unique_id| or -1 if item
 // is not found or it is pending or transient. Item's unique id is retrieved
 // via GetUniqueID method.
 int GetCommittedItemIndexWithUniqueID(NavigationManager* navigation_manager,
                                       int unique_id);
 
 }  // namespace web
 
 #endif  // IOS_WEB_NAVIGATION_NAVIGATION_MANAGER_UTIL_H_