Attempt four at landing the "histogram.h removed from message_loop.h" patch.

net/tools/fetch/http_server_request_info.h

 // Copyright (c) 2009 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_BASE_TOOLS_HTTP_SERVER_REQUEST_INFO_H_
 #define NET_BASE_TOOLS_HTTP_SERVER_REQUEST_INFO_H_
 
+#include <map>
 #include <string>
 
 #include "net/http/http_request_info.h"
 
 // Meta information about an HTTP request.
 // This is geared toward servers in that it keeps a map of the headers and
 // values rather than just a list of header strings (which net::HttpRequestInfo
 // does).
 class HttpServerRequestInfo : public net::HttpRequestInfo {
  public:
   HttpServerRequestInfo() : net::HttpRequestInfo() {}
 
   // A map of the names -> values for HTTP headers.
   std::map<std::string, std::string> headers;
 };
 
 #endif  // NET_BASE_TOOLS_HTTP_SERVER_REQUEST_INFO_H_