Move ownership of AppSorting from ExtensionPrefs to ExtensionSystem

extensions/browser/extension_system.h

 // Copyright 2014 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 EXTENSIONS_BROWSER_EXTENSION_SYSTEM_H_
 #define EXTENSIONS_BROWSER_EXTENSION_SYSTEM_H_
 
 #include <string>
 
 #include "base/callback_forward.h"
@@ skipping 12 matching lines @@
 class DeviceLocalAccountManagementPolicyProvider;
 }
 #endif  // defined(OS_CHROMEOS)
 
 namespace content {
 class BrowserContext;
 }
 
 namespace extensions {
 
+class AppSorting;
 class ContentVerifier;
 class Extension;
 class ExtensionSet;
 class InfoMap;
 class ManagementPolicy;
 class OneShotEvent;
 class QuotaService;
 class RuntimeData;
 class SharedUserScriptMaster;
 class StateStore;
@@ skipping 36 matching lines @@
   // The rules store is created at startup.
   virtual StateStore* rules_store() = 0;
 
   // Returns the IO-thread-accessible extension data.
   virtual InfoMap* info_map() = 0;
 
   // Returns the QuotaService that limits calls to certain extension functions.
   // Lives on the UI thread. Created at startup.
   virtual QuotaService* quota_service() = 0;
 
+  // Returns the AppSorting which provides an ordering for all installed apps.
+  virtual AppSorting* app_sorting() = 0;
+
   // Called by the ExtensionService that lives in this system. Gives the
   // info map a chance to react to the load event before the EXTENSION_LOADED
   // notification has fired. The purpose for handling this event first is to
   // avoid race conditions by making sure URLRequestContexts learn about new
   // extensions before anything else needs them to know. This operation happens
   // asynchronously. |callback| is run on the calling thread once completed.
   virtual void RegisterExtensionWithRequestContexts(
       const Extension* extension,
       const base::Closure& callback) {}
 
@@ skipping 13 matching lines @@
   // Get a set of extensions that depend on the given extension.
   // TODO(elijahtaylor): Move SharedModuleService out of chrome/browser
   // so it can be retrieved from ExtensionSystem directly.
   virtual scoped_ptr<ExtensionSet> GetDependentExtensions(
       const Extension* extension) = 0;
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_EXTENSION_SYSTEM_H_