Support class and typedef literals as expressions.

tests/compiler/dart2js/cpa_inference_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.
 
 import "dart:uri";
 import "../../../lib/compiler/implementation/elements/elements.dart";
 import '../../../lib/compiler/implementation/scanner/scannerlib.dart';
 import '../../../lib/compiler/implementation/source_file.dart';
 import '../../../lib/compiler/implementation/types/types.dart';
 import '../../../lib/compiler/implementation/tree/tree.dart';
@@ skipping 117 matching lines @@
   abstract class int extends num { }
   abstract class double extends num { }
   class bool {}
   class String {}
   class Object {}
   class Function {}
   abstract class List {}
   abstract class Map {}
   class Closure {}
   class Null {}
+  class Type {}
   class Dynamic_ {}
   bool identical(Object a, Object b) {}''';
 
 AnalysisResult analyze(String code) {
   Uri uri = new Uri.fromComponents(scheme: 'source');
   MockCompiler compiler = new MockCompiler(coreSource: CORELIB,
                                            enableConcreteTypeInference: true);
   compiler.sourceFiles[uri.toString()] = new SourceFile(uri.toString(), code);
   compiler.runCompiler(uri);
   return new AnalysisResult(compiler);
@@ skipping 389 matching lines @@
   testGetters();
   testSetters();
   testNamedParameters();
   testListLiterals();
   testMapLiterals();
   testReturn();
   // testNoReturn(); // right now we infer the empty type instead of null
   testArithmeticOperators();
   testOperators();
 }