Move all tests using dart:io to a separate directory

tests/standalone/src/UrlEncodingTest.dart

Index: tests/standalone/src/UrlEncodingTest.dart
diff --git a/tests/standalone/src/UrlEncodingTest.dart b/tests/standalone/src/UrlEncodingTest.dart
deleted file mode 100644
index 87ba72caae41df8cc34258e44048c846231f1d75..0000000000000000000000000000000000000000
--- a/tests/standalone/src/UrlEncodingTest.dart
+++ /dev/null
@@ -1,29 +0,0 @@
-// 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("dart:io");
-
-void testParseEncodedString() {
-  String encodedString = 'foo+bar%20foobar%25%26';
-  Expect.equals(HttpUtil.decodeUrlEncodedString(encodedString),
-                'foo bar foobar%&');
-}
-
-void testParseQueryString() {
-  // The query string includes escaped "?"s, "&"s, "%"s and "="s.
-  // These should not affect the splitting of the string.
-  String queryString = '%3F=%3D&foo=bar&%26=%25';
-  Map<String, String> map = HttpUtil.splitQueryString(queryString);
-  for (String key in map.getKeys()) {
-    Expect.equals(map[key], { '&'   : '%',
-                              'foo' : 'bar',
-                              '?'   : '='}[key]);
-  }
-  Expect.setEquals(map.getKeys(), ['&', '?', 'foo']);
-}
-
-void main() {
-  testParseEncodedString();
-  testParseQueryString();
-}