Add a PrefetchList to Prerender Local Predictor, to emulate how effective

chrome/browser/prerender/prerender_field_trial.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_FIELD_TRIAL_H_
 #define CHROME_BROWSER_PRERENDER_PRERENDER_FIELD_TRIAL_H_
 
 #include <string>
 
 class Profile;
@@ skipping 53 matching lines @@
 // that will be appended is the urlencoded query json.
 std::string GetPrerenderServiceURLPrefix();
 
 // Returns the prerender service behavior ID that should be passed to the
 // to the prerender service in requests.
 int GetPrerenderServiceBehaviorID();
 
 // Returns the fetch timeout to be used for the prerender service, in ms.
 int GetPrerenderServiceFetchTimeoutMs();
 
+// Returns the timeout for entries in the prefetch list, in seconds.
+int GetPrerenderPrefetchListTimeoutSeconds();
+
 // Returns the TTL to be used for the local predictor.
 int GetLocalPredictorTTLSeconds();
 
 // Returns the half-life time to use to decay local predictor prerender
 // priorities.
 int GetLocalPredictorPrerenderPriorityHalfLifeTimeSeconds();
 
 // Returns the maximum number of concurrent prerenders the local predictor
 // may maintain.
 int GetLocalPredictorMaxConcurrentPrerenders();
@@ skipping 12 matching lines @@
 bool SkipLocalPredictorDefaultNoPrerender();
 bool SkipLocalPredictorLocalCandidates();
 bool SkipLocalPredictorServiceCandidates();
 
 // Indicates whether no prerender cookie stores should be used for prerendering.
 bool IsPrerenderCookieStoreEnabled();
 
 }  // namespace prerender
 
 #endif  // CHROME_BROWSER_PRERENDER_PRERENDER_FIELD_TRIAL_H_