Add IPC for DNS host address resolution.

content/renderer/p2p/socket_dispatcher.cc

Index: content/renderer/p2p/socket_dispatcher.cc
diff --git a/content/renderer/p2p/socket_dispatcher.cc b/content/renderer/p2p/socket_dispatcher.cc
index 43c9de374c506e6182dccfb259308c4c93a9768c..ba00e99ae8ee58edf497b849052a3304a9ea772b 100644
--- a/content/renderer/p2p/socket_dispatcher.cc
+++ b/content/renderer/p2p/socket_dispatcher.cc
@@ -6,6 +6,8 @@
 
 #include "base/message_loop_proxy.h"
 #include "content/common/p2p_messages.h"
+#include "content/renderer/p2p/host_address_request.h"
+#include "content/renderer/p2p/socket_client.h"
 
 P2PSocketDispatcher::P2PSocketDispatcher(RenderView* render_view)
     : RenderViewObserver(render_view),
@@ -42,6 +44,7 @@ bool P2PSocketDispatcher::OnMessageReceived(const IPC::Message& message) {
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(P2PSocketDispatcher, message)
     IPC_MESSAGE_HANDLER(P2PMsg_NetworkListChanged, OnNetworkListChanged)
+    IPC_MESSAGE_HANDLER(P2PMsg_GetHostAddressResult, OnGetHostAddressResult)
     IPC_MESSAGE_HANDLER(P2PMsg_OnSocketCreated, OnSocketCreated)
     IPC_MESSAGE_HANDLER(P2PMsg_OnIncomingTcpConnection, OnIncomingTcpConnection)
     IPC_MESSAGE_HANDLER(P2PMsg_OnError, OnError)
@@ -51,6 +54,10 @@ bool P2PSocketDispatcher::OnMessageReceived(const IPC::Message& message) {
   return handled;
 }
 
+base::MessageLoopProxy* P2PSocketDispatcher::message_loop() {
+  return message_loop_;
+}
+
 int P2PSocketDispatcher::RegisterClient(P2PSocketClient* client) {
   return clients_.Add(client);
 }
@@ -64,8 +71,13 @@ void P2PSocketDispatcher::SendP2PMessage(IPC::Message* msg) {
   Send(msg);
 }
 
-base::MessageLoopProxy* P2PSocketDispatcher::message_loop() {
-  return message_loop_;
+int P2PSocketDispatcher::RegisterHostAddressRequest(
+    P2PHostAddressRequest* request) {
+  return host_address_requests_.Add(request);
+}
+
+void P2PSocketDispatcher::UnregisterHostAddressRequest(int id) {
+  host_address_requests_.Remove(id);
 }
 
 void P2PSocketDispatcher::OnNetworkListChanged(
@@ -74,6 +86,18 @@ void P2PSocketDispatcher::OnNetworkListChanged(
                                   networks);
 }
 
+void P2PSocketDispatcher::OnGetHostAddressResult(
+    int32 request_id,
+    const net::IPAddressNumber& address) {
+  P2PHostAddressRequest* request = host_address_requests_.Lookup(request_id);
+  if (!request) {
+    VLOG(1) << "Received P2P message for socket that doesn't exist.";
+    return;
+  }
+
+  request->OnResponse(address);
+}
+
 void P2PSocketDispatcher::OnSocketCreated(
     int socket_id, const net::IPEndPoint& address) {
   P2PSocketClient* client = GetClient(socket_id);