Move remaining non-test, non-Chrome-specific Prefs code to base/prefs/.

chrome/browser/extensions/extension_sorting.cc

 // 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.
 
 #include "chrome/browser/extensions/extension_sorting.h"
 
 #include <algorithm>
 #include <vector>
 
+#include "base/prefs/pref_service.h"
 #include "chrome/browser/extensions/extension_scoped_prefs.h"
 #include "chrome/browser/extensions/extension_service.h"
-#include "chrome/browser/prefs/pref_service.h"
 #include "chrome/common/chrome_notification_types.h"
 #include "chrome/common/extensions/extension.h"
 #include "content/public/browser/notification_service.h"
 
 #if defined(OS_CHROMEOS)
 #include "chrome/browser/chromeos/extensions/default_app_order.h"
 #endif
 
 using extensions::ExtensionPrefs;
 
@@ skipping 580 matching lines @@
     ++app_it;
 
   // If there is no next after the collision, returns the next ordinal.
   if (app_it == page.end())
     return app_launch_ordinal.CreateAfter();
 
   // Otherwise, returns the ordinal between the collision and the next ordinal.
   return app_launch_ordinal.CreateBetween(app_it->first);
 }