Make the HttpParser and HttpUtil classes private

tests/standalone/src/io/UrlEncodingTest.dart

Index: tests/standalone/src/io/UrlEncodingTest.dart
diff --git a/tests/standalone/src/io/UrlEncodingTest.dart b/tests/standalone/src/io/UrlEncodingTest.dart
index 87ba72caae41df8cc34258e44048c846231f1d75..cce2ce10a8202dc618578df2f19d10a968e8f2ba 100644
--- a/tests/standalone/src/io/UrlEncodingTest.dart
+++ b/tests/standalone/src/io/UrlEncodingTest.dart
@@ -2,11 +2,11 @@
 // 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");
+#source("../../../../runtime/bin/http_utils.dart");
 
 void testParseEncodedString() {
   String encodedString = 'foo+bar%20foobar%25%26';
-  Expect.equals(HttpUtil.decodeUrlEncodedString(encodedString),
+  Expect.equals(_HttpUtils.decodeUrlEncodedString(encodedString),
                 'foo bar foobar%&');
 }
 
@@ -14,7 +14,7 @@ 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);
+  Map<String, String> map = _HttpUtils.splitQueryString(queryString);
   for (String key in map.getKeys()) {
     Expect.equals(map[key], { '&'   : '%',
                               'foo' : 'bar',