Move operator<< for StringPiece into string_piece.{h,cc}

net/dns/dns_transaction.h

-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// 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.
 
 #ifndef NET_DNS_DNS_TRANSACTION_H_
 #define NET_DNS_DNS_TRANSACTION_H_
 #pragma once
 
 #include <string>
 #include <vector>
 
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
+#include "base/string_piece.h"
 #include "base/timer.h"
 #include "base/threading/non_thread_safe.h"
 #include "net/base/completion_callback.h"
 #include "net/base/ip_endpoint.h"
 #include "net/base/net_export.h"
 #include "net/base/net_log.h"
 #include "net/base/rand_callback.h"
 
 namespace net {
 
@@ skipping 71 matching lines @@
   base::OneShotTimer<DnsTransaction> timer_;
 
   BoundNetLog net_log_;
 
   DISALLOW_COPY_AND_ASSIGN(DnsTransaction);
 };
 
 }  // namespace net
 
 #endif  // NET_DNS_DNS_TRANSACTION_H_