[Sync] Move ModelType and related classes to 'syncer' namespace

sync/notifier/invalidation_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.
 //
 // An implementation of SyncNotifier that wraps an invalidation
 // client.  Handles the details of connecting to XMPP and hooking it
 // up to the invalidation client.
 //
 // You probably don't want to use this directly; use
 // NonBlockingInvalidationNotifier.
@@ skipping 39 matching lines @@
   virtual ~InvalidationNotifier();
 
   // SyncNotifier implementation.
   virtual void AddObserver(SyncNotifierObserver* observer) OVERRIDE;
   virtual void RemoveObserver(SyncNotifierObserver* observer) OVERRIDE;
   virtual void SetUniqueId(const std::string& unique_id) OVERRIDE;
   virtual void SetStateDeprecated(const std::string& state) OVERRIDE;
   virtual void UpdateCredentials(
       const std::string& email, const std::string& token) OVERRIDE;
   virtual void UpdateEnabledTypes(
-      syncable::ModelTypeSet enabled_types) OVERRIDE;
+      syncer::ModelTypeSet enabled_types) OVERRIDE;
   virtual void SendNotification(
-      syncable::ModelTypeSet changed_types) OVERRIDE;
+      syncer::ModelTypeSet changed_types) OVERRIDE;
 
   // ChromeInvalidationClient::Listener implementation.
   virtual void OnInvalidate(const ObjectIdPayloadMap& id_payloads) OVERRIDE;
   virtual void OnNotificationsEnabled() OVERRIDE;
   virtual void OnNotificationsDisabled(
       NotificationsDisabledReason reason) OVERRIDE;
 
  private:
   // We start off in the STOPPED state.  When we get our initial
   // credentials, we connect and move to the CONNECTING state.  When
@@ skipping 29 matching lines @@
 
   // The invalidation client.
   ChromeInvalidationClient invalidation_client_;
 
   DISALLOW_COPY_AND_ASSIGN(InvalidationNotifier);
 };
 
 }  // namespace syncer
 
 #endif  // SYNC_NOTIFIER_INVALIDATION_NOTIFIER_H_