iwyu: Include stringprintf.h where appropriate, part 2.

chrome/service/net/service_url_request_context.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 "chrome/service/net/service_url_request_context.h"
 
 #if defined(OS_POSIX) && !defined(OS_MACOSX)
 #include <sys/utsname.h>
 #endif
 
 #include "base/compiler_specific.h"
 #include "base/message_loop_proxy.h"
-#include "base/string_util.h"
+#include "base/stringprintf.h"
 #include "base/sys_info.h"
 #include "chrome/common/chrome_version_info.h"
 #include "chrome/service/service_process.h"
 #include "net/base/cert_verifier.h"
 #include "net/base/cookie_monster.h"
 #include "net/base/cookie_policy.h"
 #include "net/base/dnsrr_resolver.h"
 #include "net/base/host_resolver.h"
 #include "net/base/ssl_config_service_defaults.h"
 #include "net/ftp/ftp_network_layer.h"
@@ skipping 152 matching lines @@
                                      proxy_config_service_.release());
   return url_request_context_;
 }
 
 scoped_refptr<base::MessageLoopProxy>
 ServiceURLRequestContextGetter::GetIOMessageLoopProxy() const {
   return io_message_loop_proxy_;
 }
 
 ServiceURLRequestContextGetter::~ServiceURLRequestContextGetter() {}