Port and integrate the irregexp engine from V8

tests/language/regex/non-character_test.dart

Index: tests/language/regex/non-character_test.dart
diff --git a/tests/language/regex/non-character_test.dart b/tests/language/regex/non-character_test.dart
new file mode 100644
index 0000000000000000000000000000000000000000..9c131bbf6881344d67be0a2cc1cd0900512a0e99
--- /dev/null
+++ b/tests/language/regex/non-character_test.dart
@@ -0,0 +1,27 @@
+// Copyright (c) 2014, 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 'util.dart';
+import 'package:expect/expect.dart';
+
+void main() {
+  description(
+  'Test for regular expressions with non-character values in them, specifically in character classes.'
+  );
+
+  shouldBeNull(firstMatch("F", new RegExp(r"[\uD7FF]")));
+  shouldBeNull(firstMatch("0", new RegExp(r"[\uD800]")));
+  shouldBeNull(firstMatch("F", new RegExp(r"[\uDFFF]")));
+  shouldBeNull(firstMatch("E", new RegExp(r"[\uE000]")));
+  shouldBeNull(firstMatch("y", new RegExp(r"[\uFDBF]")));
+  shouldBeNull(firstMatch("y", new RegExp(r"[\uFDD0]")));
+  shouldBeNull(firstMatch("y", new RegExp(r"[\uFDEF]")));
+  shouldBeNull(firstMatch("y", new RegExp(r"[\uFDF0]")));
+  shouldBeNull(firstMatch("y", new RegExp(r"[\uFEFF]")));
+  shouldBeNull(firstMatch("y", new RegExp(r"[\uFEFF]")));
+  shouldBeNull(firstMatch("y", new RegExp(r"[\uFFFE]")));
+  shouldBeNull(firstMatch("y", new RegExp(r"[\uFFFF]")));
+  shouldBeNull(firstMatch("y", new RegExp(r"[\u10FFFF]")));
+  shouldBeNull(firstMatch("y", new RegExp(r"[\u110000]")));
+}