Switch CoreTabHelper to use WebContentsUserData.

chrome/browser/prerender/prerender_manager.cc

 // 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.
 
 #include "chrome/browser/prerender/prerender_manager.h"
 
 #include <algorithm>
 #include <functional>
 #include <string>
 #include <vector>
@@ skipping 384 matching lines @@
       prerender_contents->ReleasePrerenderContents();
   TabContents* old_tab_contents = TabContents::FromWebContents(web_contents);
   DCHECK(new_tab_contents);
   DCHECK(old_tab_contents);
 
   MarkWebContentsAsPrerendered(new_tab_contents->web_contents());
 
   // Merge the browsing history.
   new_tab_contents->web_contents()->GetController().CopyStateFromAndPrune(
       &old_tab_contents->web_contents()->GetController());
-  old_tab_contents->core_tab_helper()->delegate()->
-      SwapTabContents(old_tab_contents, new_tab_contents);
+  CoreTabHelper::FromWebContents(old_tab_contents->web_contents())->delegate()->
+      SwapTabContents(old_tab_contents->web_contents(),
+                      new_tab_contents->web_contents());
   prerender_contents->CommitHistory(new_tab_contents);
 
   GURL icon_url = prerender_contents->icon_url();
   if (!icon_url.is_empty()) {
     std::vector<FaviconURL> urls;
     urls.push_back(FaviconURL(icon_url, FaviconURL::FAVICON));
     new_tab_contents->favicon_tab_helper()->OnUpdateFaviconURL(
         prerender_contents->page_id(),
         urls);
   }
@@ skipping 872 matching lines @@
   if (!render_process_host || !render_process_host->GetBrowserContext())
     return NULL;
   Profile* profile = Profile::FromBrowserContext(
       render_process_host->GetBrowserContext());
   if (!profile)
     return NULL;
   return PrerenderManagerFactory::GetInstance()->GetForProfile(profile);
 }
 
 }  // namespace prerender