Canonicalize raw type

sdk/lib/_internal/compiler/implementation/world.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;
 
 class World {
   final Compiler compiler;
   final Map<ClassElement, Set<ClassElement>> subtypes;
   final Map<ClassElement, Set<ClassElement>> typesImplementedBySubclasses;
@@ skipping 58 matching lines @@
       Set<ClassElement> classes = subtypes[cls];
       if (classes == null) return;
       classes.forEach((ClassElement sub) {
         potentiallyAddForRti(sub, callback);
       });
     }
 
     compiler.resolverWorld.isChecks.forEach((DartType type) {
       if (type is InterfaceType) {
         InterfaceType itf = type;
-        if (!itf.typeArguments.isEmpty) {
+        if (!itf.isRaw) {
           potentiallyAddForRti(itf.element, null);
         }
       }
     });
 
     List<ClassElement> worklist =
         new List<ClassElement>.from(classesNeedingRti);
     while (!worklist.isEmpty) {
       Element e = worklist.removeLast();
       Set<Element> dependencies = rtiDependencies[e];
@@ skipping 130 matching lines @@
   final SourceString name;
 
   MemberSet(SourceString this.name) : elements = new Set<Element>();
 
   void add(Element element) {
     elements.add(element);
   }
 
   bool get isEmpty => elements.isEmpty;
 }