Store the UploadData identifier in NavigationEntryImpl.

content/public/browser/navigation_entry.h

 // Copyright (c) 2011 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 CONTENT_PUBLIC_BROWSER_NAVIGATION_ENTRY_H_
 #define CONTENT_PUBLIC_BROWSER_NAVIGATION_ENTRY_H_
 #pragma once
 
 #include <string>
 
@@ skipping 109 matching lines @@
 
   // Post data is form data that was posted to get to this page. The data will
   // have to be reposted to reload the page properly. This flag indicates
   // whether the page had post data.
   //
   // The actual post data is stored in the content_state and is extracted by
   // WebKit to actually make the request.
   virtual void SetHasPostData(bool has_post_data) = 0;
   virtual bool GetHasPostData() const = 0;
 
+  // The Post identifier associated with the page.
+  virtual void SetPostID(int64 post_id) = 0;
+  virtual int64 GetPostID() const = 0;
+
   // The favicon data and tracking information. See content::FaviconStatus.
   virtual const FaviconStatus& GetFavicon() const = 0;
   virtual FaviconStatus& GetFavicon() = 0;
 
   // All the SSL flags and state. See content::SSLStatus.
   virtual const SSLStatus& GetSSL() const = 0;
   virtual SSLStatus& GetSSL() = 0;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_NAVIGATION_ENTRY_H_