Add NetworkAdaptor to dart:io.

runtime/bin/vmstats_impl.cc

Index: runtime/bin/vmstats_impl.cc
diff --git a/runtime/bin/vmstats_impl.cc b/runtime/bin/vmstats_impl.cc
index b73fe64ddf809cf9da2872fd733592a32d8a6780..b3eebff2ba390a0f1f9523ff7fb6e4fea63a5894 100644
--- a/runtime/bin/vmstats_impl.cc
+++ b/runtime/bin/vmstats_impl.cc
@@ -59,7 +59,8 @@ void VmStats::StartServer(int port, const char* root_dir) {
   // TODO(tball): allow host to be specified.
   char* host = const_cast<char*>(DEFAULT_HOST);
   OSError* os_error;
-  SocketAddresses* addresses = Socket::LookupAddress(host, -1, &os_error);
+  AddressList<SocketAddress>* addresses =
+      Socket::LookupAddress(host, -1, &os_error);
   if (addresses == NULL) {
     Log::PrintErr("Failed IP lookup of VmStats host %s: %s\n",
                   host, os_error->message());
@@ -68,6 +69,7 @@ void VmStats::StartServer(int port, const char* root_dir) {
   const intptr_t BACKLOG = 128;  // Default value from HttpServer.dart
   int64_t address = ServerSocket::CreateBindListen(
       addresses->GetAt(0)->addr(), port, BACKLOG);
+  delete addresses;
   if (address < 0) {
     Log::PrintErr("Failed binding VmStats socket: %s:%d\n", host, port);
     return;