Retain fewer names for reflection.

dart/tests/compiler/dart2js/mirrors_used_test.dart

 // Copyright (c) 2013, 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 that the @MirrorsUsed annotation suppress hints and that only
 /// requested elements are retained for reflection.
 library dart2js.test.mirrors_used_test;
 
 import 'package:expect/expect.dart';
 
@@ skipping 36 matching lines @@
   // 1. Too many elements retained for reflection.
   // 2. Some code was refactored, and there are more methods.
   // Either situation could be problematic, but in situation 2, it is often
   // acceptable to increase [expectedMethodCount] a little.
   int expectedMethodCount = 317;
   Expect.isTrue(
       generatedCode.length <= expectedMethodCount,
       'Too many compiled methods: '
       '${generatedCode.length} > $expectedMethodCount');
 
+  // The following names should be retained:
+  List expectedNames = [
+      'Foo', // The name of class Foo.
+      r'Foo$', // The name of class Foo's constructor.
+      'Foo_staticMethod', // The name of Foo.staticMethod.
+      r'get$field', // The (getter) name of Foo.field.
+      r'instanceMethod$0']; // The name of Foo.instanceMethod.
+  Set recordedNames = new Set()
+      ..addAll(compiler.backend.emitter.recordedMangledNames)
+      ..addAll(compiler.backend.emitter.mangledFieldNames.keys)
+      ..addAll(compiler.backend.emitter.mangledGlobalFieldNames.keys);
+  Expect.setEquals(new Set.from(expectedNames), recordedNames);
+
   for (var library in compiler.libraries.values) {
     library.forEachLocalMember((member) {
       if (library == compiler.mainApp
           && member.name == const SourceString('Foo')) {
         Expect.isTrue(
             compiler.backend.isNeededForReflection(member), '$member');
         member.forEachLocalMember((classMember) {
           Expect.isTrue(
               compiler.backend.isNeededForReflection(classMember),
               '$classMember');
@@ skipping 30 matching lines @@
 library lib;
 
 import 'dart:mirrors';
 
 useReflect(type) {
   print(new Symbol('Foo'));
   print(MirrorSystem.getName(reflectClass(type).owner.qualifiedName));
 }
 """,
 };