Remove the HistoryState property of WebRequest....

webkit/glue/webframe.h

 // Copyright (c) 2006-2009 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_WEBFRAME_H_
 #define WEBKIT_GLUE_WEBFRAME_H_
 
 #include "base/scoped_ptr.h"
 #include "googleurl/src/gurl.h"
 #include "skia/ext/bitmap_platform_device.h"
@@ skipping 58 matching lines @@
   // This grants the currently loaded Document access to all security origins
   // (including file URLs).  Use with care.  The access is revoked when a new
   // document is loaded into this frame.
   virtual void GrantUniversalAccess() = 0;
 
   virtual NPObject* GetWindowNPObject() = 0;
 
   // Loads the given WebRequest.
   virtual void LoadRequest(WebRequest* request) = 0;
 
+  // Loads the given history state.  This corresponds to a back/forward
+  // navigation.
+  virtual void LoadHistoryState(const std::string& history_state) = 0;
+
   // This method is short-hand for calling LoadAlternateHTMLString with a dummy
   // request for the given base_url.
   virtual void LoadHTMLString(const std::string& html_text,
                               const GURL& base_url) = 0;
 
   // Loads alternative HTML text in place of a particular URL. This method is
   // designed with error pages in mind, in which case it would typically be
   // called in response to WebViewDelegate's didFailProvisionalLoadWithError
   // method.
   //
@@ skipping 325 matching lines @@
   virtual int PendingFrameUnloadEventCount() const = 0;
 
  protected:
   virtual ~WebFrame() {}
 
  private:
   DISALLOW_COPY_AND_ASSIGN(WebFrame);
 };
 
 #endif  // WEBKIT_GLUE_WEBFRAME_H_