"Reverting 14829-14832"

tests/compiler/dart2js/constant_folding_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.
 // Test constant folding on numbers.
 
 import 'compiler_helper.dart';
 
 const String NUMBER_FOLDING = """
 void main() {
   var a = 4;
@@ skipping 14 matching lines @@
 foo(a, b, c, d) {
   if (a == null) return 1;
   if (null == b) return 2;
   if (4 == c) return 3;
   if ("foo" == d) return 3;
 }
 """;
 
 main() {
   compileAndMatch(
-      NUMBER_FOLDING, 'main', new RegExp(r"print\(7\)"));
+      NUMBER_FOLDING, 'main', const RegExp(r"print\(7\)"));
   compileAndMatch(
-      NEGATIVE_NUMBER_FOLDING, 'main', new RegExp(r"print\(1\)"));
+      NEGATIVE_NUMBER_FOLDING, 'main', const RegExp(r"print\(1\)"));
 
   String generated = compile(NULL_EQUALS_FOLDING, entry: 'foo');
-  RegExp regexp = new RegExp(r'a == null');
+  RegExp regexp = const RegExp(r'a == null');
   Expect.isTrue(regexp.hasMatch(generated));
 
-  regexp = new RegExp(r'null == b');
+  regexp = const RegExp(r'null == b');
   Expect.isTrue(regexp.hasMatch(generated));
 
-  regexp = new RegExp(r'4 === c');
+  regexp = const RegExp(r'4 === c');
   Expect.isTrue(regexp.hasMatch(generated));
 
-  regexp = new RegExp("'foo' === d");
+  regexp = const RegExp("'foo' === d");
   Expect.isTrue(regexp.hasMatch(generated));
 }