Address the remaining review comments on http://chromiumcodereview.appspot.com/9431029.

lib/compiler/implementation/compile_time_constants.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.
 
 class Constant implements Hashable {
   const Constant();
 
   bool isNull() => false;
   bool isBool() => false;
   bool isTrue() => false;
@@ skipping 757 matching lines @@
     // TODO(floitsch): this should be a List<String> type.
     Type keysType = null;
     ListConstant keysList = new ListConstant(keysType, keys);
     compiler.constantHandler.registerCompileTimeConstant(keysList);
     SourceString className = hasProtoKey
                              ? MapConstant.DART_PROTO_CLASS
                              : MapConstant.DART_CLASS;
     ClassElement classElement = compiler.jsHelperLibrary.find(className);
     classElement.ensureResolved(compiler);
     // TODO(floitsch): copy over the generic type.
-    Type type = new InterfaceType(classElement.name, classElement);
+    Type type = new InterfaceType(classElement);
     compiler.registerInstantiatedClass(classElement);
     Constant constant = new MapConstant(type, keysList, values, protoValue);
     compiler.constantHandler.registerCompileTimeConstant(constant);
     return constant;
   }
 
   Constant visitLiteralNull(LiteralNull node) {
     return new NullConstant();
   }
 
@@ skipping 358 matching lines @@
       Constant fieldValue = fieldValues[field];
       if (fieldValue === null) {
         // Use the default value.
         fieldValue = compiler.compileVariable(field);
       }
       jsNewArguments.add(fieldValue);
     });
     return jsNewArguments;
   }
 }