Revert "Delete support for source mirrors"

tests/compiler/dart2js/mirrors_helper.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.
+
+/**
+ * This file is read by 'mirrors_test.dart'.
+ */
+
+library mirrors_helper;
+
+typedef E Func<E,F extends Foo>(F f);
+
+main() {
+
+}
+
+/// Singleline doc comment.
+@Metadata(null)
+// Singleline comment 1.
+// Singleline comment 2.
+@Metadata(true)
+@Metadata(false)
+@Metadata(0)
+@Metadata(1.5)
+@Metadata("Foo")
+@Metadata(const ["Foo"])
+@Metadata(const {'foo':"Foo"})
+@metadata
+/** Multiline doc comment. */
+/* Multiline comment. */ class Foo {
+  m(@metadata a) {}
+}
+
+
+abstract class Bar<E> {
+
+}
+
+class Baz<E,F extends Foo> implements Bar<E> {
+  Baz();
+  const Baz.named();
+  factory Baz.factory() => new Baz<E,F>();
+
+  static method1(e) {}
+  void method2(E e, [F f = null]) {}
+  Baz<E,F> method3(E func1(F f), Func<E,F> func2) => null;
+
+  bool operator==(Object other) => false;
+  int operator-() => 0;
+  operator$foo() {}
+}
+
+class Boz extends Foo {
+  var field1;
+  int _field2;
+  final String field3 = "field3";
+
+  int get field2 => _field2;
+  void set field2(int value) {
+    _field2 = value;
+  }
+}
+
+class _PrivateClass {
+  var _privateField;
+  get _privateGetter => _privateField;
+  void set _privateSetter(value) => _privateField = value;
+  void _privateMethod() {}
+  _PrivateClass._privateConstructor();
+  factory _PrivateClass._privateFactoryConstructor() => null;
+}
+
+const metadata = const Metadata(null);
+
+class Metadata {
+  final data;
+  const Metadata(this.data);
+}