extensions: Relocate pref name constants.

chrome/browser/extensions/extension_prefs.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_EXTENSIONS_EXTENSION_PREFS_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_PREFS_H_
 
 #include <set>
 #include <string>
 #include <vector>
@@ skipping 459 matching lines @@
     return content_settings_store_.get();
   }
 
   // The underlying PrefService.
   PrefService* pref_service() const { return prefs_; }
 
   // The underlying AppSorting.
   AppSorting* app_sorting() const { return app_sorting_.get(); }
 
   // Describes the URLs that are able to install extensions. See
-  // prefs::kExtensionAllowedInstallSites for more information.
+  // pref_names::kAllowedInstallSites for more information.
   URLPatternSet GetAllowedInstallSites();
 
   // Schedules garbage collection of an extension's on-disk data on the next
   // start of this ExtensionService. Applies only to extensions with isolated
   // storage.
   void SetNeedsStorageGarbageCollection(bool value);
   bool NeedsStorageGarbageCollection();
 
   // Used by ShellWindowGeometryCache to persist its cache. These methods
   // should not be called directly.
@@ skipping 137 matching lines @@
   scoped_ptr<TimeProvider> time_provider_;
 
   bool extensions_disabled_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionPrefs);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_PREFS_H_