Accept IPv6 addresses in Uri.http and Uri.https, and correctly nest IPv6 addresses in '[' and ']'.

tests/corelib/uri_http_test.dart

 // 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.
 
 import "package:expect/expect.dart";
 
 testHttpUri() {
   void check(Uri uri, String expected) {
     Expect.equals(expected, uri.toString());
   }
@@ skipping 13 matching lines @@
   check(new Uri.http("host", "a/b/"), "http://host/a/b/");
   check(new Uri.http("host", "/a/b/"), "http://host/a/b/");
   check(new Uri.http("host", "a b"), "http://host/a%20b");
   check(new Uri.http("host", "/a b"), "http://host/a%20b");
   check(new Uri.http("host", "/a b/"), "http://host/a%20b/");
   check(new Uri.http("host", "/a%2F"), "http://host/a%252F");
   check(new Uri.http("host", "/a%2F/"), "http://host/a%252F/");
   check(new Uri.http("host", "/a/b", { "c": "d" }), "http://host/a/b?c=d");
   check(new Uri.http("host",
                      "/a/b", { "c=": "&d" }), "http://host/a/b?c%3D=%26d");
+  check(new Uri.http("[::]", "a"), "http://[::]/a");
+  check(new Uri.http("[::127.0.0.1]", "a"), "http://[::127.0.0.1]/a");
 }
 
 testHttpsUri() {
   void check(Uri uri, String expected) {
     Expect.equals(expected, uri.toString());
   }
 
   check(new Uri.https("", ""), "https:");
   check(new Uri.https("@:", ""), "https:");
   check(new Uri.https("@:8080", ""), "https:");
   check(new Uri.https("@host:", ""), "https://host");
   check(new Uri.https("@host:", ""), "https://host");
   check(new Uri.https("xxx:yyy@host:8080", ""), "https://xxx:yyy@host:8080");
   check(new Uri.https("host", "a"), "https://host/a");
   check(new Uri.https("host", "/a"), "https://host/a");
   check(new Uri.https("host", "a/"), "https://host/a/");
   check(new Uri.https("host", "/a/"), "https://host/a/");
   check(new Uri.https("host", "a/b"), "https://host/a/b");
   check(new Uri.https("host", "/a/b"), "https://host/a/b");
   check(new Uri.https("host", "a/b/"), "https://host/a/b/");
   check(new Uri.https("host", "/a/b/"), "https://host/a/b/");
   check(new Uri.https("host", "a b"), "https://host/a%20b");
   check(new Uri.https("host", "/a b"), "https://host/a%20b");
   check(new Uri.https("host", "/a b/"), "https://host/a%20b/");
   check(new Uri.https("host", "/a%2F"), "https://host/a%252F");
   check(new Uri.https("host", "/a%2F/"), "https://host/a%252F/");
   check(new Uri.https("host", "/a/b", { "c": "d" }), "https://host/a/b?c=d");
   check(new Uri.https("host",
                       "/a/b", { "c=": "&d" }), "https://host/a/b?c%3D=%26d");
+  check(new Uri.https("[::]", "a"), "https://[::]/a");
+  check(new Uri.https("[::127.0.0.1]", "a"), "https://[::127.0.0.1]/a");
 }
 
 main() {
   testHttpUri();
   testHttpsUri();
 }