Convert Pass()→std::move() in mojo/services/

mojo/services/tracing/trace_data_sink.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 "mojo/services/tracing/trace_data_sink.h"
 
+#include <utility>
+
 #include "base/logging.h"
 #include "mojo/common/data_pipe_utils.h"
 
 using mojo::common::BlockingCopyFromString;
 
 namespace tracing {
 
 TraceDataSink::TraceDataSink(mojo::ScopedDataPipeProducerHandle pipe)
-    : pipe_(pipe.Pass()), empty_(true) {
-}
+    : pipe_(std::move(pipe)), empty_(true) {}
 
 TraceDataSink::~TraceDataSink() {
   if (pipe_.is_valid())
     pipe_.reset();
   DCHECK(!pipe_.is_valid());
 }
 
 void TraceDataSink::AddChunk(const std::string& json) {
   if (!empty_)
     BlockingCopyFromString(",", pipe_);
   empty_ = false;
   BlockingCopyFromString(json, pipe_);
 }
 
 }  // namespace tracing