cleanup: Remove NOTIFICATION_EXTENSION_UNLOADED from managed_user_service.cc

chrome/browser/managed_mode/managed_user_service.h

Index: chrome/browser/managed_mode/managed_user_service.h
diff --git a/chrome/browser/managed_mode/managed_user_service.h b/chrome/browser/managed_mode/managed_user_service.h
index aac1df566537c79dadcdf728c96f9c08a3acf59a..e8b69d18bf4fcfcc5467e5f367d6594e6deb4486 100644
--- a/chrome/browser/managed_mode/managed_user_service.h
+++ b/chrome/browser/managed_mode/managed_user_service.h
@@ -11,15 +11,15 @@
 #include "base/callback.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/prefs/pref_change_registrar.h"
+#include "base/scoped_observer.h"
 #include "base/strings/string16.h"
 #include "chrome/browser/managed_mode/managed_mode_url_filter.h"
 #include "chrome/browser/managed_mode/managed_users.h"
 #include "chrome/browser/sync/profile_sync_service_observer.h"
 #include "chrome/browser/ui/browser_list_observer.h"
 #include "components/keyed_service/core/keyed_service.h"
-#include "content/public/browser/notification_observer.h"
-#include "content/public/browser/notification_registrar.h"
 #include "content/public/browser/web_contents.h"
+#include "extensions/browser/extension_registry_observer.h"
 #include "extensions/browser/management_policy.h"
 
 class Browser;
@@ -31,6 +31,10 @@ class ManagedUserSettingsService;
 class PermissionRequestCreator;
 class Profile;
 
+namespace extensions {
+class ExtensionRegistry;
+}
+
 namespace user_prefs {
 class PrefRegistrySyncable;
 }
@@ -41,7 +45,7 @@ class PrefRegistrySyncable;
 class ManagedUserService : public KeyedService,
                            public extensions::ManagementPolicy::Provider,
                            public ProfileSyncServiceObserver,
-                           public content::NotificationObserver,
+                           public extensions::ExtensionRegistryObserver,
                            public chrome::BrowserListObserver {
  public:
   typedef std::vector<base::string16> CategoryList;
@@ -145,10 +149,14 @@ class ManagedUserService : public KeyedService,
   // ProfileSyncServiceObserver implementation:
   virtual void OnStateChanged() OVERRIDE;
 
-  // content::NotificationObserver implementation:
-  virtual void Observe(int type,
-                       const content::NotificationSource& source,
-                       const content::NotificationDetails& details) OVERRIDE;
+  // extensions::ExtensionRegistryObserver implementation.
+  virtual void OnExtensionLoaded(
+      content::BrowserContext* browser_context,
+      const extensions::Extension* extension) OVERRIDE;
+  virtual void OnExtensionUnloaded(
+      content::BrowserContext* browser_context,
+      const extensions::Extension* extension,
+      extensions::UnloadedExtensionInfo::Reason reason) OVERRIDE;
 
   // chrome::BrowserListObserver implementation:
   virtual void OnBrowserSetLastActive(Browser* browser) OVERRIDE;
@@ -230,7 +238,10 @@ class ManagedUserService : public KeyedService,
   // Owns us via the KeyedService mechanism.
   Profile* profile_;
 
-  content::NotificationRegistrar registrar_;
+  ScopedObserver<extensions::ExtensionRegistry,
+                 extensions::ExtensionRegistryObserver>
+      extension_registry_observer_;
+
   PrefChangeRegistrar pref_change_registrar_;
 
   // True iff we're waiting for the Sync service to be initialized.