Add new InternetAddress class with a static lookup function (including IPv6 results).

tests/standalone/io/http_compression_test.dart

Index: tests/standalone/io/http_compression_test.dart
diff --git a/tests/standalone/io/http_compression_test.dart b/tests/standalone/io/http_compression_test.dart
index 8bec0a2e117c4da4b41e9403403b7a02951a537f..140cc399dbb59ad0d519e264375c813562975e0f 100644
--- a/tests/standalone/io/http_compression_test.dart
+++ b/tests/standalone/io/http_compression_test.dart
@@ -19,7 +19,7 @@ void testServerCompress() {
         request.response.close();
       });
       var client = new HttpClient();
-      client.get("localhost", server.port, "/")
+      client.get("127.0.0.1", server.port, "/")
           .then((request) {
             request.headers.set(HttpHeaders.ACCEPT_ENCODING, "gzip,deflate");
             return request.close();
@@ -55,7 +55,7 @@ void testAcceptEncodingHeader() {
         request.response.close();
       });
       var client = new HttpClient();
-      client.get("localhost", server.port, "/")
+      client.get("127.0.0.1", server.port, "/")
           .then((request) {
             request.headers.set(HttpHeaders.ACCEPT_ENCODING, encoding);
             return request.close();