Add ConstantExpression.evaluate.

pkg/compiler/lib/src/compiler.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.
 
 part of dart2js;
 
 /**
  * If true, print a warning for each method that was resolved, but not
  * compiled.
  */
@@ skipping 2408 matching lines @@
         .createInstantiation([keyType, valueType]);
   }
 
   @override
   InterfaceType get nullType => nullClass.computeType(compiler);
 
   @override
   InterfaceType get numType => numClass.computeType(compiler);
 
   @override
-  InterfaceType get stringType =>  stringClass.computeType(compiler);
+  InterfaceType get stringType => stringClass.computeType(compiler);
+
+  @override
+  InterfaceType get typeType => typeClass.computeType(compiler);
 
   @override
   InterfaceType iterableType([DartType elementType = const DynamicType()]) {
     return iterableClass.computeType(compiler)
         .createInstantiation([elementType]);
   }
 
   @override
   InterfaceType futureType([DartType elementType = const DynamicType()]) {
     return futureClass.computeType(compiler).createInstantiation([elementType]);
   }
 
   @override
   InterfaceType streamType([DartType elementType = const DynamicType()]) {
     return streamClass.computeType(compiler).createInstantiation([elementType]);
   }
 }
 
 typedef void InternalErrorFunction(Spannable location, String message);