Use a direct include of strings headers in content/browser/, part 1.

content/browser/download/download_create_info.cc

 // 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.
 
 #include "content/browser/download/download_create_info.h"
 
 #include <string>
 
 #include "base/format_macros.h"
-#include "base/stringprintf.h"
+#include "base/strings/stringprintf.h"
 
 namespace content {
 
 DownloadCreateInfo::DownloadCreateInfo(
     const base::Time& start_time,
     int64 total_bytes,
     const net::BoundNetLog& bound_net_log,
     bool has_user_gesture,
     PageTransition transition_type)
     : start_time(start_time),
@@ skipping 27 matching lines @@
                             url().spec().c_str(),
                             request_handle.DebugString().c_str(),
                             total_bytes);
 }
 
 const GURL& DownloadCreateInfo::url() const {
   return url_chain.empty() ? GURL::EmptyGURL() : url_chain.back();
 }
 
 }  // namespace content