Remove PrefServiceSimple, replacing it with PrefService and PrefRegistrySimple.

chrome/browser/extensions/app_launcher.cc

 // Copyright (c) 2013 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/extensions/app_launcher.h"
 
 #include "base/command_line.h"
 #include "base/threading/sequenced_worker_pool.h"
 #include "chrome/browser/browser_process.h"
+#include "chrome/browser/prefs/pref_registry_simple.h"
 #include "chrome/browser/prefs/pref_service.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/pref_names.h"
 #include "content/public/browser/browser_thread.h"
 
 #if defined(OS_WIN)
 #include "chrome/installer/launcher_support/chrome_launcher_support.h"
 #include "chrome/installer/util/browser_distribution.h"
 #endif
 
@@ skipping 75 matching lines @@
   PrefService* prefs = g_browser_process->local_state();
   // In some tests, the prefs aren't initialised, but the NTP still needs to
   // work.
   if (!prefs)
     return SynchronousAppLauncherChecks() == APP_LAUNCHER_ENABLED;
   return prefs->GetBoolean(prefs::kAppLauncherIsEnabled);
 }
 
 namespace app_launcher {
 
-void RegisterPrefs(PrefServiceSimple* pref_service) {
+void RegisterPrefs(PrefRegistrySimple* pref_service) {
   // If it is impossible to synchronously determine whether the app launcher is
   // enabled, assume it is disabled. Anything that needs to know the absolute
   // truth should call UpdateIsAppLauncherEnabled().
   //
   // This pref is just a cache of the value from the registry from last time
   // Chrome ran. To avoid having the NTP block on a registry check, it guesses
   // that the value hasn't changed since last time it was checked, using this
   // preference.
   bool is_enabled = SynchronousAppLauncherChecks() == APP_LAUNCHER_ENABLED;
   pref_service->RegisterBooleanPref(prefs::kAppLauncherIsEnabled, is_enabled);
 }
 
 }  // namespace app_launcher
 
 }  // namespace extensions