Persist offline page info in a navigation entry if needed

content/public/browser/navigation_entry.h

 // Copyright (c) 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 CONTENT_PUBLIC_BROWSER_NAVIGATION_ENTRY_H_
 #define CONTENT_PUBLIC_BROWSER_NAVIGATION_ENTRY_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 207 matching lines @@
   virtual void SetHttpStatusCode(int http_status_code) = 0;
   virtual int GetHttpStatusCode() const = 0;
 
   // The redirect chain traversed during this navigation, from the initial
   // redirecting URL to the final non-redirecting current URL.
   virtual void SetRedirectChain(const std::vector<GURL>& redirects) = 0;
   virtual const std::vector<GURL>& GetRedirectChain() const = 0;
 
   // True if this entry is restored and hasn't been loaded.
   virtual bool IsRestored() const = 0;
+
+  // Returns the extra headers (separated by \r\n) to send during the request.
+  virtual std::string GetExtraHeaders() const = 0;
+
+  // Adds more extra headers (separated by \r\n) to send during the request.
+  virtual void AddExtraHeaders(const std::string& extra_headers) = 0;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_NAVIGATION_ENTRY_H_