Remove the use of ProvisionalChangeToMainFrameUrl from prerender code.

chrome/browser/prerender/prerender_manager.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 CHROME_BROWSER_PRERENDER_PRERENDER_MANAGER_H_
 #define CHROME_BROWSER_PRERENDER_PRERENDER_MANAGER_H_
 
 #include <list>
 #include <map>
 #include <string>
@@ skipping 459 matching lines @@
 
     void set_swap_successful(bool swap_successful) {
       swap_successful_ = swap_successful;
     }
 
     void BeginSwap();
 
     // content::WebContentsObserver implementation.
     virtual void AboutToNavigateRenderView(
         content::RenderViewHost* render_view_host) OVERRIDE;
-    virtual void ProvisionalChangeToMainFrameUrl(
-        const GURL& url,
-        content::RenderFrameHost* render_frame_host) OVERRIDE;
     virtual void DidCommitProvisionalLoadForFrame(
         content::RenderFrameHost* render_frame_host,
         const GURL& validated_url,
         content::PageTransition transition_type) OVERRIDE;
     virtual void DidFailProvisionalLoad(
         content::RenderFrameHost* render_frame_host,
         const GURL& validated_url,
         int error_code,
         const base::string16& error_description) OVERRIDE;
     virtual void WebContentsDestroyed() OVERRIDE;
@@ skipping 242 matching lines @@
   bool cookie_store_loaded_;
 
   base::Closure on_cookie_store_loaded_cb_for_testing_;
 
   DISALLOW_COPY_AND_ASSIGN(PrerenderManager);
 };
 
 }  // namespace prerender
 
 #endif  // CHROME_BROWSER_PRERENDER_PRERENDER_MANAGER_H_