Convert Pass()→std::move() in sync/

sync/internal_api/protocol_event_buffer.cc

 // Copyright 2014 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.
 
 #include "sync/internal_api/protocol_event_buffer.h"
 
 #include <stddef.h>
 
 #include "sync/internal_api/public/events/protocol_event.h"
 
@@ skipping 13 matching lines @@
     buffer_.pop_front();
     delete to_delete;
   }
 }
 
 ScopedVector<ProtocolEvent>
 ProtocolEventBuffer::GetBufferedProtocolEvents() const {
   ScopedVector<ProtocolEvent> ret;
   for (std::deque<ProtocolEvent*>::const_iterator it = buffer_.begin();
        it != buffer_.end(); ++it) {
-    ret.push_back((*it)->Clone().Pass());
+    ret.push_back((*it)->Clone());
   }
-  return ret.Pass();
+  return ret;
 }
 
 }  // namespace syncer