Clean up coding style

net/url_request/protocol_intercept_job_factory.h

 // 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_URL_REQUEST_PROTOCOL_INTERCEPT_JOB_FACTORY_H_
 #define NET_URL_REQUEST_PROTOCOL_INTERCEPT_JOB_FACTORY_H_
 
+#include <string>
+
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
 #include "net/base/net_export.h"
 #include "net/url_request/url_request_job_factory.h"
 
 class GURL;
 
 namespace net {
 
@@ skipping 24 matching lines @@
  private:
   scoped_ptr<URLRequestJobFactory> job_factory_;
   scoped_ptr<ProtocolHandler> protocol_handler_;
 
   DISALLOW_COPY_AND_ASSIGN(ProtocolInterceptJobFactory);
 };
 
 }  // namespace net
 
 #endif  // NET_URL_REQUEST_PROTOCOL_INTERCEPT_JOB_FACTORY_H_