Remove ExtensionPrefs's dependency on ChromeAppSorting.

chrome/browser/extensions/chrome_app_sorting.h

 // Copyright 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.
 
 #ifndef CHROME_BROWSER_EXTENSIONS_CHROME_APP_SORTING_H_
 #define CHROME_BROWSER_EXTENSIONS_CHROME_APP_SORTING_H_
 
 #include <map>
 #include <set>
 #include <string>
 
 #include "base/basictypes.h"
 #include "chrome/browser/extensions/extension_prefs.h"
 #include "extensions/browser/app_sorting.h"
 #include "extensions/common/extension.h"
 #include "sync/api/string_ordinal.h"
 
 class ExtensionSyncService;
 class PrefService;
 
 namespace extensions {
 
 class ExtensionScopedPrefs;
 
 class ChromeAppSorting : public AppSorting {
  public:
-  explicit ChromeAppSorting(ExtensionScopedPrefs* extension_scoped_prefs);
+  ChromeAppSorting();
   virtual ~ChromeAppSorting();
 
   // AppSorting implementation:
+  virtual void SetExtensionScopedPrefs(ExtensionScopedPrefs* prefs) OVERRIDE;
   virtual void SetExtensionSyncService(
       ExtensionSyncService* extension_sync_service) OVERRIDE;
   virtual void Initialize(
       const extensions::ExtensionIdList& extension_ids) OVERRIDE;
   virtual void FixNTPOrdinalCollisions() OVERRIDE;
   virtual void EnsureValidOrdinals(
       const std::string& extension_id,
       const syncer::StringOrdinal& suggested_page) OVERRIDE;
   virtual void OnExtensionMoved(
       const std::string& moved_extension_id,
@@ skipping 135 matching lines @@
 
   // The set of extensions that don't appear in the new tab page.
   std::set<std::string> ntp_hidden_extensions_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromeAppSorting);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_CHROME_APP_SORTING_H_