Move sync/notifier to components/invalidation

sync/internal_api/public/base/ack_handler.h

Index: sync/internal_api/public/base/ack_handler.h
diff --git a/sync/notifier/ack_handler.h b/sync/internal_api/public/base/ack_handler.h
similarity index 86%
rename from sync/notifier/ack_handler.h
rename to sync/internal_api/public/base/ack_handler.h
index f1fc16fa702d294e5a96bb3188de3af85f3dc809..c5570295f3ae8624c982d78b641bf702e4497b15 100644
--- a/sync/notifier/ack_handler.h
+++ b/sync/internal_api/public/base/ack_handler.h
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef SYNC_NOTIFIER_ACK_HANDLER_H_
-#define SYNC_NOTIFIER_ACK_HANDLER_H_
+#ifndef SYNC_INTERNAL_API_PUBLIC_BASE_ACK_HANDLER_H_
+#define SYNC_INTERNAL_API_PUBLIC_BASE_ACK_HANDLER_H_
 
 #include <vector>
 
@@ -39,4 +39,4 @@ class SYNC_EXPORT AckHandler {
 
 }  // namespace syncer
 
-#endif  // SYNC_NOTIFIER_ACK_HANDLER_H_
+#endif  // SYNC_INTERNAL_API_PUBLIC_BASE_ACK_HANDLER_H_