Add IPC for DNS host address resolution.

content/common/p2p_messages.h

 // 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.
 
 // IPC messages for the P2P Transport API.
 // Multiply-included message file, hence no include guard.
 
 #include "content/common/p2p_sockets.h"
 #include "ipc/ipc_message_macros.h"
 #include "net/base/ip_endpoint.h"
 #include "net/base/net_util.h"
 
 #define IPC_MESSAGE_START P2PMsgStart
 
 IPC_ENUM_TRAITS(P2PSocketType)
 
 IPC_STRUCT_TRAITS_BEGIN(net::NetworkInterface)
   IPC_STRUCT_TRAITS_MEMBER(name)
   IPC_STRUCT_TRAITS_MEMBER(address)
 IPC_STRUCT_TRAITS_END()
 
 // P2P Socket messages sent from the browser to the renderer.
 
 IPC_MESSAGE_ROUTED1(P2PMsg_NetworkListChanged,
                     net::NetworkInterfaceList /* networks */)
 
+IPC_MESSAGE_ROUTED2(P2PMsg_GetHostAddressResult,
+                    int32 /* request_id */,
+                    net::IPAddressNumber /* address */)
+
 IPC_MESSAGE_ROUTED2(P2PMsg_OnSocketCreated,
                     int /* socket_id */,
                     net::IPEndPoint /* socket_address */)
 
 IPC_MESSAGE_ROUTED1(P2PMsg_OnError,
                     int /* socket_id */)
 
 IPC_MESSAGE_ROUTED2(P2PMsg_OnIncomingTcpConnection,
                     int /* socket_id */,
                     net::IPEndPoint /* socket_address */)
 
 IPC_MESSAGE_ROUTED3(P2PMsg_OnDataReceived,
                     int /* socket_id */,
                     net::IPEndPoint /* socket_address */,
                     std::vector<char> /* data */)
 
 // P2P Socket messages sent from the renderer to the browser.
 
 // Start/stop sending P2PMsg_NetworkListChanged messages when network
 // configuration changes.
 IPC_MESSAGE_ROUTED0(P2PHostMsg_StartNetworkNotifications)
 IPC_MESSAGE_ROUTED0(P2PHostMsg_StopNetworkNotifications)
 
+IPC_MESSAGE_ROUTED2(P2PHostMsg_GetHostAddress,
+                    std::string /* host_name */,
+                    int32 /* request_id */)
+
 IPC_MESSAGE_ROUTED4(P2PHostMsg_CreateSocket,
                     P2PSocketType /* type */,
                     int /* socket_id */,
                     net::IPEndPoint /* local_address */,
                     net::IPEndPoint /* remote_address */)
 
 IPC_MESSAGE_ROUTED3(P2PHostMsg_AcceptIncomingTcpConnection,
                     int /* listen_socket_id */,
                     net::IPEndPoint /* remote_address */,
                     int /* connected_socket_id */)
 
 // TODO(sergeyu): Use shared memory to pass the data.
 IPC_MESSAGE_ROUTED3(P2PHostMsg_Send,
                     int /* socket_id */,
                     net::IPEndPoint /* socket_address */,
                     std::vector<char> /* data */)
 
 IPC_MESSAGE_ROUTED1(P2PHostMsg_DestroySocket,
                     int /* socket_id */)