Fix debugging module(replace int with intptr_t) so it works on Windows x64.

runtime/bin/dbg_connection_win.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "platform/globals.h"
 #if defined(TARGET_OS_WINDOWS)
 
 #include "bin/dbg_connection.h"
 
 #include "bin/eventhandler.h"
 
 
 namespace dart {
 namespace bin {
 
 void DebuggerConnectionImpl::ThreadEntry(uword args) {
   ListenSocket* listen_socket =
       reinterpret_cast<ListenSocket*>(DebuggerConnectionHandler::listener_fd_);
   SOCKET client_socket = accept(listen_socket->socket(), NULL, NULL);
   if (client_socket == INVALID_SOCKET) {
     FATAL("Accepting new debugger connection failed.\n");
   }
   ClientSocket* socket = new ClientSocket(client_socket);
-  DebuggerConnectionHandler::AcceptDbgConnection(reinterpret_cast<int>(socket));
+  DebuggerConnectionHandler::AcceptDbgConnection(
+      reinterpret_cast<intptr_t>(socket));
 }
 
 
 void DebuggerConnectionImpl::StartHandler(int port_number) {
   ASSERT(DebuggerConnectionHandler::listener_fd_ != -1);
   int result = dart::Thread::Start(&DebuggerConnectionImpl::ThreadEntry, 0);
   if (result != 0) {
     FATAL1("Failed to start debugger connection handler thread: %d\n", result);
   }
 }
 
 
 intptr_t DebuggerConnectionImpl::Send(intptr_t socket,
                                       const char* buf,
                                       int len) {
   ClientSocket* client_socket = reinterpret_cast<ClientSocket*>(socket);
   return send(client_socket->socket(), buf, len, 0);
 }
 
 
 intptr_t DebuggerConnectionImpl::Receive(intptr_t socket, char* buf, int len) {
   ClientSocket* client_socket = reinterpret_cast<ClientSocket*>(socket);
   return recv(client_socket->socket(), buf, len, 0);
 }
 
 }  // namespace bin
 }  // namespace dart
 
 #endif  // defined(TARGET_OS_WINDOWS)