Add GetOriginalRequestURL() to NavigationItem interface.

ios/web/navigation/crw_session_entry.h

 // Copyright 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 IOS_WEB_NAVIGATION_CRW_SESSION_ENTRY_H_
 #define IOS_WEB_NAVIGATION_CRW_SESSION_ENTRY_H_
 
 #import <Foundation/Foundation.h>
 #include <stdint.h>
 
@@ skipping 43 matching lines @@
 extern NSString* const kSessionEntryUseDesktopUserAgentKey;
 }
 
 // A CRWSessionEntry is similar to a NavigationEntry object in desktop Chrome.
 // It maintains the information needed to save/restore a single entry in session
 // history (i.e., one site) for a tab. A tab may have multiple of these objects
 // comprising its entire session history.
 // TODO(rohitrao): Fold CRWSessionEntry's logic into NavigationItem.
 @interface CRWSessionEntry : NSObject<NSCoding, NSCopying>
 
-@property(nonatomic, readonly) const GURL& originalUrl;
-
 // Pointer to the NavigationItem associated with this CRWSessionEntry.
 // Eventually, this will replace CRWSessionEntry entirely.
 @property(nonatomic, readonly) web::NavigationItem* navigationItem;
 
 // Pointer to the NavigationItemImpl associated with this CRWSessionEntry.
 @property(nonatomic, readonly) web::NavigationItemImpl* navigationItemImpl;
 
 // Initialize the session entry with the given NavigationItem.
 - (instancetype)initWithNavigationItem:
     (std::unique_ptr<web::NavigationItem>)item;
 
 @end
 
 #endif  // IOS_WEB_NAVIGATION_CRW_SESSION_ENTRY_H_