Rename SyncNotifier->Invalidator and SyncNotifierObserver->InvalidationHandler.

chrome/browser/extensions/api/push_messaging/push_messaging_invalidation_handler.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_PUSH_MESSAGING_PUSH_MESSAGING_INVALIDATION_HANDLER_H_
 #define CHROME_BROWSER_EXTENSIONS_API_PUSH_MESSAGING_PUSH_MESSAGING_INVALIDATION_HANDLER_H_
 
 #include <set>
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/threading/thread_checker.h"
 #include "chrome/browser/extensions/api/push_messaging/push_messaging_invalidation_mapper.h"
-#include "sync/notifier/sync_notifier_observer.h"
+#include "sync/notifier/invalidation_handler.h"
 
 class InvalidationFrontend;
 
 namespace extensions {
 
 class PushMessagingInvalidationHandlerDelegate;
 
 // This class maps extension IDs to the corresponding object IDs, manages
 // invalidation registrations, and dispatches callbacks for any invalidations
 // received.
 class PushMessagingInvalidationHandler : public PushMessagingInvalidationMapper,
-                                         public syncer::SyncNotifierObserver {
+                                         public syncer::InvalidationHandler {
  public:
   // |service| and |delegate| must remain valid for the lifetime of this object.
   // |extension_ids| is the set of extension IDs for which push messaging is
   // enabled.
   PushMessagingInvalidationHandler(
       InvalidationFrontend* service,
       PushMessagingInvalidationHandlerDelegate* delegate,
       const std::set<std::string>& extension_ids);
   virtual ~PushMessagingInvalidationHandler();
 
   // PushMessagingInvalidationMapper implementation.
   virtual void RegisterExtension(const std::string& extension_id) OVERRIDE;
   virtual void UnregisterExtension(const std::string& extension_id) OVERRIDE;
 
-  // SyncNotifierObserver implementation.
+  // InvalidationHandler implementation.
   virtual void OnNotificationsEnabled() OVERRIDE;
   virtual void OnNotificationsDisabled(
       syncer::NotificationsDisabledReason reason) OVERRIDE;
   virtual void OnIncomingNotification(
       const syncer::ObjectIdStateMap& id_state_map,
       syncer::IncomingNotificationSource source) OVERRIDE;
 
   const std::set<std::string>& GetRegisteredExtensionsForTest() const {
     return registered_extensions_;
   }
 
  private:
   void UpdateRegistrations();
 
   base::ThreadChecker thread_checker_;
   InvalidationFrontend* const service_;
   std::set<std::string> registered_extensions_;
   PushMessagingInvalidationHandlerDelegate* const delegate_;
 
   DISALLOW_COPY_AND_ASSIGN(PushMessagingInvalidationHandler);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_PUSH_MESSAGING_PUSH_MESSAGING_INVALIDATION_HANDLER_H_