Add GetOriginalRequestURL() to NavigationItem interface.

ios/web/navigation/navigation_item_impl.h

 // Copyright 2014 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_ITEM_IMPL_H_
 #define IOS_WEB_NAVIGATION_NAVIGATION_ITEM_IMPL_H_
 
 #import <Foundation/Foundation.h>
 
 #include <memory>
@@ skipping 24 matching lines @@
 
   // Accessors for the delegate used to drive the navigation entry facade.
   // NOTE: to minimize facade synchronization code, NavigationItems take
   // ownership of their facade delegates.
   void SetFacadeDelegate(
       std::unique_ptr<NavigationItemFacadeDelegate> facade_delegate);
   NavigationItemFacadeDelegate* GetFacadeDelegate() const;
 
   // NavigationItem implementation:
   int GetUniqueID() const override;
+  void SetOriginalRequestURL(const GURL& url) override;
+  const GURL& GetOriginalRequestURL() const override;
   void SetURL(const GURL& url) override;
   const GURL& GetURL() const override;
   void SetReferrer(const web::Referrer& referrer) override;
   const web::Referrer& GetReferrer() const override;
   void SetVirtualURL(const GURL& url) override;
   const GURL& GetVirtualURL() const override;
   void SetTitle(const base::string16& title) override;
   const base::string16& GetTitle() const override;
   void SetPageDisplayState(const PageDisplayState& display_state) override;
   const PageDisplayState& GetPageDisplayState() const override;
@@ skipping 57 matching lines @@
 
   // Whether this (pending) navigation is renderer-initiated.  Resets to false
   // for all types of navigations after commit.
   void set_is_renderer_initiated(bool is_renderer_initiated) {
     is_renderer_initiated_ = is_renderer_initiated;
   }
   bool is_renderer_initiated() const { return is_renderer_initiated_; }
 
  private:
   int unique_id_;
+  GURL original_request_url_;
   GURL url_;
   Referrer referrer_;
   GURL virtual_url_;
   base::string16 title_;
   PageDisplayState page_display_state_;
   ui::PageTransition transition_type_;
   FaviconStatus favicon_;
   SSLStatus ssl_;
   base::Time timestamp_;
   bool is_overriding_user_agent_;
@@ skipping 20 matching lines @@
 
   // Weak pointer to the facade delegate.
   std::unique_ptr<NavigationItemFacadeDelegate> facade_delegate_;
 
   // Copy and assignment is explicitly allowed for this class.
 };
 
 }  // namespace web
 
 #endif  // IOS_WEB_NAVIGATION_NAVIGATION_ITEM_IMPL_H_