Use ExtensionRegistryObserver instead of deprecated extension notification from c/b/e/api.

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>
 
 #include "base/callback_forward.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_vector.h"
+#include "base/scoped_observer.h"
 #include "chrome/browser/extensions/api/declarative/rules_registry.h"
 #include "chrome/browser/profiles/profile.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "extensions/browser/browser_context_keyed_api_factory.h"
+#include "extensions/browser/extension_registry_observer.h"
 
 class Profile;
 
 namespace content {
 class BrowserContext;
 class NotificationSource;
 }
 
 namespace extensions {
 class ContentRulesRegistry;
+class ExtensionRegistry;
 class RulesRegistry;
 class RulesRegistryStorageDelegate;
 }
 
 namespace extensions {
 
 // This class owns all RulesRegistries implementations of an ExtensionService.
 // This class lives on the UI thread.
 class RulesRegistryService : public BrowserContextKeyedAPI,
-                             public content::NotificationObserver {
+                             public content::NotificationObserver,
+                             public ExtensionRegistryObserver {
  public:
   typedef RulesRegistry::WebViewKey WebViewKey;
   struct RulesRegistryKey {
     std::string event_name;
     WebViewKey webview_key;
     RulesRegistryKey(const std::string event_name,
                      const WebViewKey& webview_key)
         : event_name(event_name),
           webview_key(webview_key) {}
     bool operator<(const RulesRegistryKey& other) const {
@@ skipping 48 matching lines @@
   // Maps <event name, webview key> to RuleRegistries that handle these
   // events.
   typedef std::map<RulesRegistryKey, scoped_refptr<RulesRegistry> >
       RulesRegistryMap;
 
   // Implementation of content::NotificationObserver.
   virtual void Observe(int type,
                        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;
+
   // 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.
   static const char* service_name() {
     return "RulesRegistryService";
   }
   static const bool kServiceHasOwnInstanceInIncognito = true;
   static const bool kServiceIsNULLWhileTesting = true;
 
   RulesRegistryMap rule_registries_;
 
   // We own the parts of the registries which need to run on the UI thread.
   ScopedVector<RulesCacheDelegate> cache_delegates_;
 
   // Weak pointer into rule_registries_ to make it easier to handle content rule
   // conditions.
   ContentRulesRegistry* content_rules_registry_;
 
   content::NotificationRegistrar registrar_;
 
+  // Listen to extension load, unloaded notification.
+  ScopedObserver<ExtensionRegistry, ExtensionRegistryObserver>
+      extension_registry_observer_;
+
   Profile* profile_;
 
   DISALLOW_COPY_AND_ASSIGN(RulesRegistryService);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_DECLARATIVE_RULES_REGISTRY_SERVICE_H__