Revert of Revert CL 117933003. Re-add resource speculative prefetching code.

chrome/common/chrome_switches.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.
 
 // Defines all the command-line switches used by Chrome.
 
 #ifndef CHROME_COMMON_CHROME_SWITCHES_H_
 #define CHROME_COMMON_CHROME_SWITCHES_H_
 
 #include "build/build_config.h"
@@ skipping 280 matching lines @@
 extern const char kSilentDebuggerExtensionAPI[];
 extern const char kSilentLaunch[];
 extern const char kSetToken[];
 extern const char kShowAppList[];
 extern const char kShowIcons[];
 extern const char kSigninProcess[];
 extern const char kSimulateUpgrade[];
 extern const char kSimulateCriticalUpdate[];
 extern const char kSimulateOutdated[];
 extern const char kSimulateOutdatedNoAU[];
-extern const char kSpeculativeResourcePrefetching[];
-extern const char kSpeculativeResourcePrefetchingDisabled[];
-extern const char kSpeculativeResourcePrefetchingEnabled[];
-extern const char kSpeculativeResourcePrefetchingLearning[];
 extern const char kSpellingServiceFeedbackUrl[];
 extern const char kSpellingServiceFeedbackIntervalSeconds[];
 extern const char kSSLVersionMax[];
 extern const char kSSLVersionMin[];
 extern const char kStartMaximized[];
 extern const char kSupervisedUserId[];
 extern const char kSupervisedUserSyncToken[];
 extern const char kSyncShortInitialRetryOverride[];
 extern const char kSyncServiceURL[];
 extern const char kSyncDisableDeferredStartup[];
@@ skipping 82 matching lines @@
 
 bool AboutInSettingsEnabled();
 bool SettingsWindowEnabled();
 
 // DON'T ADD RANDOM STUFF HERE. Put it in the main section above in
 // alphabetical order, or in one of the ifdefs (also in order in each section).
 
 }  // namespace switches
 
 #endif  // CHROME_COMMON_CHROME_SWITCHES_H_