Add observer interface to PrerenderContents.

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 1150 matching lines @@
   return base::TimeTicks::Now();
 }
 
 PrerenderContents* PrerenderManager::CreatePrerenderContents(
     const GURL& url,
     const content::Referrer& referrer,
     Origin origin,
     uint8 experiment_id) {
   DCHECK(CalledOnValidThread());
   return prerender_contents_factory_->CreatePrerenderContents(
-      this, prerender_tracker_, profile_, url, referrer, origin, experiment_id);
+      this, profile_, url, referrer, origin, experiment_id);
 }
 
 void PrerenderManager::SortActivePrerenders() {
   std::sort(active_prerenders_.begin(), active_prerenders_.end(),
             PrerenderData::OrderByExpiryTime());
 }
 
 PrerenderManager::PrerenderData* PrerenderManager::FindPrerenderData(
     const GURL& url,
     const SessionStorageNamespace* session_storage_namespace) {
@@ skipping 160 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