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

chrome/browser/net/url_request_slow_download_job.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/browser/net/url_request_slow_download_job.h"
 
 #include "base/compiler_specific.h"
 #include "base/message_loop.h"
+#include "base/stringprintf.h"
 #include "base/string_util.h"
 #include "googleurl/src/gurl.h"
 #include "net/base/io_buffer.h"
 #include "net/http/http_response_headers.h"
 #include "net/url_request/url_request.h"
 #include "net/url_request/url_request_filter.h"
 
 const int kFirstDownloadSize = 1024 * 35;
 const int kSecondDownloadSize = 1024 * 10;
 
@@ skipping 139 matching lines @@
     raw_headers.append(
       "HTTP/1.1 200 OK\n"
       "Content-type: text/plain\n");
   } else {
     raw_headers.append(
       "HTTP/1.1 200 OK\n"
       "Content-type: application/octet-stream\n"
       "Cache-Control: max-age=0\n");
 
     if (LowerCaseEqualsASCII(kKnownSizeUrl, request_->url().spec().c_str())) {
-      raw_headers.append(StringPrintf("Content-Length: %d\n",
+      raw_headers.append(base::StringPrintf(
+          "Content-Length: %d\n",
           kFirstDownloadSize + kSecondDownloadSize));
     }
   }
 
   // ParseRawHeaders expects \0 to end each header line.
   ReplaceSubstringsAfterOffset(&raw_headers, 0, "\n", std::string("\0", 1));
   info->headers = new net::HttpResponseHeaders(raw_headers);
 }
 
 bool URLRequestSlowDownloadJob::GetMimeType(std::string* mime_type) const {
   net::HttpResponseInfo info;
   GetResponseInfoConst(&info);
   return info.headers && info.headers->GetMimeType(mime_type);
 }