Remove the HistoryState property of WebRequest....

webkit/glue/weburlrequest.h

 // Copyright (c) 2006-2008 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 WEBKIT_GLUE_WEBURLREQUEST_H_
 #define WEBKIT_GLUE_WEBURLREQUEST_H_
 
 #include <map>
 #include <string>
 
@@ skipping 59 matching lines @@
   // Helper function for GetHeaderValue to retrieve the referrer. This
   // referrer is generated automatically by WebKit when navigation events
   // occur. If there was no referrer (for example, the browser instructed
   // WebKit to navigate), the returned string will be empty.
   //
   // It is preferred to call this instead of GetHttpHeaderValue, because the
   // way referrers are stored may change in the future.
   //
   virtual std::string GetHttpReferrer() const = 0;
 
-  // Get/set the opaque history state (used for back/forward navigations).
-  virtual std::string GetHistoryState() const = 0;
-  virtual void SetHistoryState(const std::string& state) = 0;
-
   // Get/set an opaque value containing the security info (including SSL
   // connection state) that should be reported as used in the response for that
   // request, or an empty string if no security info should be reported.  This
   // is usually used to simulate security errors on a page (typically an error
   // page that should contain the errors of the actual page that has the
   // errors).
   virtual std::string GetSecurityInfo() const = 0;
   virtual void SetSecurityInfo(const std::string& info) = 0;
 
   // Returns true if the request has upload data.
   virtual bool HasUploadData() const = 0;
 
   // Returns the request upload data. This object is temporary and should be
   // deleted after use.
   virtual void GetUploadData(net::UploadData* data) const = 0;
 
   // Set the request upload data.
   virtual void SetUploadData(const net::UploadData& data) = 0;
 
   // Sets the requestor id.
   virtual void SetRequestorID(int requestor_id) = 0;
 
   virtual ~WebRequest() { }
 };
 
 #endif  // #ifndef WEBKIT_GLUE_WEBURLREQUEST_H_