Rename SyncNotifier->Invalidator and SyncNotifierObserver->InvalidationHandler.

sync/notifier/sync_notifier.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.
-//
-// Interface to the sync notifier, which is an object that receives
-// notifications when updates are available for a set of sync types.
-// All the observers are notified when such an event happens.
-
-#ifndef SYNC_NOTIFIER_SYNC_NOTIFIER_H_
-#define SYNC_NOTIFIER_SYNC_NOTIFIER_H_
-
-#include <string>
-
-#include "sync/internal_api/public/base/model_type.h"
-#include "sync/notifier/invalidation_util.h"
-
-namespace syncer {
-class SyncNotifierObserver;
-
-class SyncNotifier {
- public:
-  SyncNotifier() {}
-  virtual ~SyncNotifier() {}
-
-  // Clients should follow the pattern below:
-  //
-  // When starting the client:
-  //
-  //   notifier->RegisterHandler(client_handler);
-  //
-  // When the set of IDs to register changes for the client during its lifetime
-  // (i.e., between calls to RegisterHandler(client_handler) and
-  // UnregisterHandler(client_handler):
-  //
-  //   notifier->UpdateRegisteredIds(client_handler, client_ids);
-  //
-  // When shutting down the client for browser shutdown:
-  //
-  //   notifier->UnregisterHandler(client_handler);
-  //
-  // Note that there's no call to UpdateRegisteredIds() -- this is because the
-  // invalidation API persists registrations across browser restarts.
-  //
-  // When permanently shutting down the client, e.g. when disabling the related
-  // feature:
-  //
-  //   notifier->UpdateRegisteredIds(client_handler, ObjectIdSet());
-  //   notifier->UnregisterHandler(client_handler);
-
-  // Starts sending notifications to |handler|.  |handler| must not be NULL,
-  // and it must already be registered.
-  virtual void RegisterHandler(SyncNotifierObserver* handler) = 0;
-
-  // Updates the set of ObjectIds associated with |handler|.  |handler| must
-  // not be NULL, and must already be registered.  An ID must be registered for
-  // at most one handler.
-  virtual void UpdateRegisteredIds(SyncNotifierObserver* handler,
-                                   const ObjectIdSet& ids) = 0;
-
-  // Stops sending notifications to |handler|.  |handler| must not be NULL, and
-  // it must already be registered.  Note that this doesn't unregister the IDs
-  // associated with |handler|.
-  virtual void UnregisterHandler(SyncNotifierObserver* handler) = 0;
-
-  // SetUniqueId must be called once, before any call to
-  // UpdateCredentials.  |unique_id| should be a non-empty globally
-  // unique string.
-  virtual void SetUniqueId(const std::string& unique_id) = 0;
-
-  // SetState must be called once, before any call to
-  // UpdateCredentials.  |state| may be empty.
-  // Deprecated in favour of InvalidationStateTracker persistence.
-  virtual void SetStateDeprecated(const std::string& state) = 0;
-
-  // The observers won't be notified of any notifications until
-  // UpdateCredentials is called at least once. It can be called more than
-  // once.
-  virtual void UpdateCredentials(
-      const std::string& email, const std::string& token) = 0;
-
-  // This is here only to support the old p2p notification implementation,
-  // which is still used by sync integration tests.
-  // TODO(akalin): Remove this once we move the integration tests off p2p
-  // notifications.
-  virtual void SendNotification(ModelTypeSet changed_types) = 0;
-};
-}  // namespace syncer
-
-#endif  // SYNC_NOTIFIER_SYNC_NOTIFIER_H_