Remove PrefServiceSimple, replacing it with PrefService and PrefRegistrySimple.

chrome/browser/ui/cocoa/confirm_quit.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_UI_COCOA_CONFIRM_QUIT_H_
 #define CHROME_BROWSER_UI_COCOA_CONFIRM_QUIT_H_
 
-class PrefServiceSimple;
+class PrefRegistrarSimple;
 
 namespace confirm_quit {
 
 enum ConfirmQuitMetric {
   // The user quit without having the feature enabled.
   kNoConfirm = 0,
   // The user held Cmd+Q for the entire duration.
   kHoldDuration,
   // The user hit Cmd+Q twice for the accelerated path.
   kDoubleTap,
   // The user tapped Cmd+Q once and then held it.
   kTapHold,
 
   kSampleCount
 };
 
 // Records the histogram value for the above metric.
 void RecordHistogram(ConfirmQuitMetric sample);
 
 // Registers the preference in app-wide local state.
-void RegisterLocalState(PrefServiceSimple* local_state);
+void RegisterLocalState(PrefRegistrarSimple* local_state);
 
 }  // namespace confirm_quit
 
 #endif  // CHROME_BROWSER_UI_COCOA_CONFIRM_QUIT_H_