Remove use of <iostream> where unnecessary.

remoting/protocol/protocol_test_client.cc

 // Copyright (c) 2011 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 "build/build_config.h"
 
 #if !defined(OS_WIN)
 extern "C" {
 #include <unistd.h>
 }
 #endif  // !defined(OS_WIN)
 
-#include <iostream>
+#include <ostream>
 #include <list>
 
 #include "base/at_exit.h"
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/message_loop_proxy.h"
 #include "base/test/mock_chrome_application_mac.h"
 #include "base/time.h"
 #include "crypto/nss_util.h"
 #include "net/base/completion_callback.h"
@@ skipping 335 matching lines @@
   std::string auth_service("oauth2");
   if (cmd_line->HasSwitch("auth_service"))
     auth_service = cmd_line->GetSwitchValueASCII("auth_service");
 
   scoped_refptr<ProtocolTestClient> client(new ProtocolTestClient());
 
   client->Run(username, auth_token, host_jid, auth_service);
 
   return 0;
 }