Canonicalize raw type

sdk/lib/_internal/compiler/implementation/native_handler.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.
 
 library native;
 
 import 'dart:uri';
 import 'dart2jslib.dart' hide SourceString;
 import 'elements/elements.dart';
 import 'js_backend/js_backend.dart';
@@ skipping 218 matching lines @@
     bool allUsedBefore = unusedClasses.isEmpty;
     for (var type in behavior.typesInstantiated) {
       if (matchedTypeConstraints.contains(type)) continue;
       matchedTypeConstraints.add(type);
       if (type is SpecialType) {
         // The two special types (=Object, =List) are always instantiated.
         continue;
       }
       assert(type is DartType);
       enqueueUnusedClassesMatching(
-          (nativeClass)  => compiler.types.isSubtype(nativeClass.type, type),
+          (nativeClass) => compiler.types.isSubtype(nativeClass.thisType, type),
           cause,
           'subtypeof($type)');
     }
 
     // Give an info so that library developers can compile with -v to find why
     // all the native classes are included.
     if (unusedClasses.isEmpty && !allUsedBefore) {
       compiler.log('All native types marked as used due to $cause.');
     }
   }
@@ skipping 595 matching lines @@
                                       String parameters) {
   buffer.add("  if (Object.getPrototypeOf(this).hasOwnProperty");
   buffer.add("('$methodName')) {\n");
   buffer.add("  $code");
   buffer.add("  } else {\n");
   buffer.add("    return Object.prototype.$methodName.call(this");
   buffer.add(parameters == '' ? '' : ', $parameters');
   buffer.add(");\n");
   buffer.add("  }\n");
 }