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

net/server/http_listen_socket.cc

 // Copyright (c) 2010 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.
 
 #ifdef _WIN32
 #include <winsock2.h>
 #else
 #include <arpa/inet.h>
 #endif
 
+#include <map>
+
 #include "base/compiler_specific.h"
 #include "base/logging.h"
 #include "base/md5.h"
 #include "base/string_util.h"
 #include "net/server/http_listen_socket.h"
 #include "net/server/http_server_request_info.h"
 
 // must run in the IO thread
 HttpListenSocket::HttpListenSocket(SOCKET s,
                                    HttpListenSocket::Delegate* delegate)
@@ skipping 286 matching lines @@
       }
     }
     delegate_->OnHttpRequest(this, request.get());
   }
 }
 
 void HttpListenSocket::DidClose(ListenSocket* sock) {
   sock->Release();
   delegate_->OnClose(this);
 }