[Sync] Move the last things out of core/.

components/sync/engine_impl/events/protocol_event_buffer.h

Index: components/sync/engine_impl/events/protocol_event_buffer.h
diff --git a/components/sync/core_impl/protocol_event_buffer.h b/components/sync/engine_impl/events/protocol_event_buffer.h
similarity index 82%
rename from components/sync/core_impl/protocol_event_buffer.h
rename to components/sync/engine_impl/events/protocol_event_buffer.h
index f0c07a52b24098066fe0268cc632a71012c69e63..bca62fb4d7ba78c917ee0ee8445acd968b690938 100644
--- a/components/sync/core_impl/protocol_event_buffer.h
+++ b/components/sync/engine_impl/events/protocol_event_buffer.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 COMPONENTS_SYNC_CORE_IMPL_PROTOCOL_EVENT_BUFFER_H_
-#define COMPONENTS_SYNC_CORE_IMPL_PROTOCOL_EVENT_BUFFER_H_
+#ifndef COMPONENTS_SYNC_ENGINE_IMPL_EVENTS_PROTOCOL_EVENT_BUFFER_H_
+#define COMPONENTS_SYNC_ENGINE_IMPL_EVENTS_PROTOCOL_EVENT_BUFFER_H_
 
 #include <stddef.h>
 
@@ -41,4 +41,4 @@ class ProtocolEventBuffer {
 
 }  // namespace syncer
 
-#endif  // COMPONENTS_SYNC_CORE_IMPL_PROTOCOL_EVENT_BUFFER_H_
+#endif  // COMPONENTS_SYNC_ENGINE_IMPL_EVENTS_PROTOCOL_EVENT_BUFFER_H_