Support class and typedef literals as expressions.

lib/compiler/implementation/compiler.dart

Index: lib/compiler/implementation/compiler.dart
diff --git a/lib/compiler/implementation/compiler.dart b/lib/compiler/implementation/compiler.dart
index e80dbaaf4351193c931f2b83f5ce8f27e36180bd..8a757ce1bed6f7bb510c6f6bca4dfda958a2130c 100644
--- a/lib/compiler/implementation/compiler.dart
+++ b/lib/compiler/implementation/compiler.dart
@@ -130,6 +130,7 @@ abstract class Compiler implements DiagnosticListener {
   ClassElement functionClass;
   ClassElement nullClass;
   ClassElement listClass;
+  ClassElement typeClass;
   ClassElement mapClass;
   Element assertMethod;
   Element identicalFunction;
@@ -374,6 +375,7 @@ abstract class Compiler implements DiagnosticListener {
     stringClass = lookupSpecialClass(const SourceString('String'));
     functionClass = lookupSpecialClass(const SourceString('Function'));
     listClass = lookupSpecialClass(const SourceString('List'));
+    typeClass = lookupSpecialClass(const SourceString('Type'));
     mapClass = lookupSpecialClass(const SourceString('Map'));
     closureClass = lookupSpecialClass(const SourceString('Closure'));
     dynamicClass = lookupSpecialClass(const SourceString('Dynamic_'));