Use ExtensionRegistryObserver instead of deprecated extension notification from c/b/extension

chrome/browser/extensions/api/declarative/rules_registry_service.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_API_DECLARATIVE_RULES_REGISTRY_SERVICE_H__
 #define CHROME_BROWSER_EXTENSIONS_API_DECLARATIVE_RULES_REGISTRY_SERVICE_H__
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 98 matching lines @@
                        const content::NotificationSource& source,
                        const content::NotificationDetails& details) OVERRIDE;
 
   // ExtensionRegistryObserver implementation.
   virtual void OnExtensionLoaded(content::BrowserContext* browser_context,
                                  const Extension* extension) OVERRIDE;
   virtual void OnExtensionUnloaded(
       content::BrowserContext* browser_context,
       const Extension* extension,
       UnloadedExtensionInfo::Reason reason) OVERRIDE;
+  virtual void OnExtensionUninstalled(content::BrowserContext* browser_context,
+                                      const Extension* extension) OVERRIDE;
 
   // Iterates over all registries, and calls |notification_callback| on them
   // with |extension_id| as the argument. If a registry lives on a different
   // thread, the call is posted to that thread, so no guarantee of synchronous
   // processing.
   void NotifyRegistriesHelper(
       void (RulesRegistry::*notification_callback)(const std::string&),
       const std::string& extension_id);
 
   // BrowserContextKeyedAPI implementation.
@@ skipping 19 matching lines @@
       extension_registry_observer_;
 
   Profile* profile_;
 
   DISALLOW_COPY_AND_ASSIGN(RulesRegistryService);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_DECLARATIVE_RULES_REGISTRY_SERVICE_H__