Switch FaviconTabHelper 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 393 matching lines @@
       &old_tab_contents->web_contents()->GetController());
   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);
+    FaviconTabHelper::FromWebContents(new_tab_contents->web_contents())->
+        OnUpdateFaviconURL(prerender_contents->page_id(), urls);
   }
 
   // Update PPLT metrics:
   // If the tab has finished loading, record a PPLT of 0.
   // If the tab is still loading, reset its start time to the current time.
   PrerenderTabHelper* prerender_tab_helper =
       new_tab_contents->prerender_tab_helper();
   DCHECK(prerender_tab_helper != NULL);
   prerender_tab_helper->PrerenderSwappedIn();
 
@@ skipping 870 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