Enable TCP preconnect and DNS preresolve on cellular.

chrome/browser/net/prediction_options.h

 // Copyright 2014 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_NET_PREDICTION_OPTIONS_H_
 #define CHROME_BROWSER_NET_PREDICTION_OPTIONS_H_
 
 namespace user_prefs {
 class PrefRegistrySyncable;
 }
@@ skipping 16 matching lines @@
   NETWORK_PREDICTION_UNSET,
 };
 
 void RegisterPredictionOptionsProfilePrefs(
     user_prefs::PrefRegistrySyncable* registry);
 
 // Migrate prefs::kNetworkPredictionEnabled user setting (if exists) to
 // prefs::kNetworkPredictionOptions (if does not have user setting).
 void MigrateNetworkPredictionUserPrefs(PrefService* pref_service);
 
-// The following two global functions determine whether predictive network
-// actions are enabled, based on preferences and network type.
+// The following two global functions determine whether prefetching
+// and prerendering are enabled, based on preferences and network type.
 
 // To be executed on the IO thread only.
-bool CanPredictNetworkActionsIO(ProfileIOData* profile_io_data);
+bool CanPrefetchAndPrerenderIO(ProfileIOData* profile_io_data);
 
 // To be executed on the UI thread only.
-bool CanPredictNetworkActionsUI(PrefService* prefs);
+bool CanPrefetchAndPrerenderUI(PrefService* prefs);
+
+// The following two global functions determine whether TCP preconnect
+// and DNS preresolution are enabled, based on preferences.
+
+// To be executed on the IO thread only.
+bool CanPreresolveAndPreconnectIO(ProfileIOData* profile_io_data);
+
+// To be executed on the UI thread only.
+bool CanPreresolveAndPreconnectUI(PrefService* prefs);
 
 }  // namespace chrome_browser_net
 
 #endif  // CHROME_BROWSER_NET_PREDICTION_OPTIONS_H_