Rename SyncNotifier->Invalidator and SyncNotifierObserver->InvalidationHandler.

sync/notifier/fake_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 SYNC_NOTIFIER_FAKE_SYNC_NOTIFIER_OBSERVER_H_
 #define SYNC_NOTIFIER_FAKE_SYNC_NOTIFIER_OBSERVER_H_
 
 #include <string>
 
 #include "base/compiler_specific.h"
-#include "sync/notifier/sync_notifier_observer.h"
+#include "sync/notifier/invalidation_handler.h"
 
 namespace syncer {
 
-class FakeSyncNotifierObserver : public SyncNotifierObserver {
+class FakeInvalidationHandler : public InvalidationHandler {
  public:
-  FakeSyncNotifierObserver();
-  virtual ~FakeSyncNotifierObserver();
+  FakeInvalidationHandler();
+  virtual ~FakeInvalidationHandler();
 
   NotificationsDisabledReason GetNotificationsDisabledReason() const;
   const ObjectIdStateMap& GetLastNotificationIdStateMap() const;
   IncomingNotificationSource GetLastNotificationSource() const;
   int GetNotificationCount() const;
 
-  // SyncNotifierObserver implementation.
+  // InvalidationHandler implementation.
   virtual void OnNotificationsEnabled() OVERRIDE;
   virtual void OnNotificationsDisabled(
       NotificationsDisabledReason reason) OVERRIDE;
   virtual void OnIncomingNotification(
       const ObjectIdStateMap& id_state_map,
       IncomingNotificationSource source) OVERRIDE;
 
  private:
   NotificationsDisabledReason reason_;
   ObjectIdStateMap last_id_state_map_;
   IncomingNotificationSource last_source_;
   int notification_count_;
 };
 
 }  // namespace syncer
 
 #endif  // SYNC_NOTIFIER_FAKE_SYNC_NOTIFIER_OBSERVER_H_