Remove _HttpUtils from dart:io.

tests/standalone/io/url_encoding_test.dart

-// Copyright (c) 2013, 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";
-import "dart:async";
-import "dart:utf";
-import 'dart:collection';
-
-part '../../../sdk/lib/io/common.dart';
-part '../../../sdk/lib/io/io_sink.dart';
-part "../../../sdk/lib/io/http.dart";
-part "../../../sdk/lib/io/http_impl.dart";
-part "../../../sdk/lib/io/http_parser.dart";
-part "../../../sdk/lib/io/http_utils.dart";
-part "../../../sdk/lib/io/socket.dart";
-part "../../../sdk/lib/io/string_transformer.dart";
-
-void testParseEncodedString() {
-  String encodedString = 'foo+bar%20foobar%25%26';
-  Expect.equals(_HttpUtils.decodeUrlEncodedString(encodedString),
-                'foo bar foobar%&');
-  encodedString = 'A+%2B+B';
-  Expect.equals(_HttpUtils.decodeUrlEncodedString(encodedString),
-                'A + B');
-}
-
-void testParseQueryString() {
-  test(String queryString, Map<String, String> expected) {
-    Map<String, String> map = _HttpUtils.splitQueryString(queryString);
-    for (String key in map.keys) {
-      Expect.equals(expected[key], map[key]);
-    }
-    Expect.setEquals(expected.keys.toSet(), map.keys.toSet());
-  }
-
-  // The query string includes escaped "?"s, "&"s, "%"s and "="s.
-  // These should not affect the splitting of the string.
-  test('%3F=%3D&foo=bar&%26=%25&sqrt2=%E2%88%9A2&name=Franti%C5%A1ek',
-       { '&'     : '%',
-         'foo'   : 'bar',
-         '?'     : '=',
-         'sqrt2' : '\u221A2',
-         'name'  : 'Franti\u0161ek'});
-
-  // Same query string with ; as separator.
-  test('%3F=%3D;foo=bar;%26=%25;sqrt2=%E2%88%9A2;name=Franti%C5%A1ek',
-       { '&'     : '%',
-         'foo'   : 'bar',
-         '?'     : '=',
-         'sqrt2' : '\u221A2',
-         'name'  : 'Franti\u0161ek'});
-
-  // Same query string with alternating ; and & separators.
-  test('%3F=%3D&foo=bar;%26=%25&sqrt2=%E2%88%9A2;name=Franti%C5%A1ek',
-       { '&'     : '%',
-         'foo'   : 'bar',
-         '?'     : '=',
-         'sqrt2' : '\u221A2',
-         'name'  : 'Franti\u0161ek'});
-  test('%3F=%3D;foo=bar&%26=%25;sqrt2=%E2%88%9A2&name=Franti%C5%A1ek',
-       { '&'     : '%',
-         'foo'   : 'bar',
-         '?'     : '=',
-         'sqrt2' : '\u221A2',
-         'name'  : 'Franti\u0161ek'});
-
-  // Corner case tests.
-  test('', { });
-  test('&', { });
-  test(';', { });
-  test('&;', { });
-  test(';&', { });
-  test('&&&&', { });
-  test(';;;;', { });
-  test('a', { 'a' : '' });
-  test('&a&', { 'a' : '' });
-  test(';a;', { 'a' : '' });
-  test('a=', { 'a' : '' });
-  test('a=&', { 'a' : '' });
-  test('a=;', { 'a' : '' });
-  test('a=&b', { 'a' : '', 'b' : '' });
-  test('a=;b', { 'a' : '', 'b' : '' });
-  test('a=&b', { 'a' : '', 'b' : '' });
-  test('a=&b=', { 'a' : '', 'b' : '' });
-
-  // These are not really a legal query string.
-  test('=', { });
-  test('=x', { });
-  test('a==&b===', { 'a' : '=', 'b' : '==' });
-}
-
-void main() {
-  testParseEncodedString();
-  testParseQueryString();
-}