dart2js: Use is-checks from the model in the old emitter.

pkg/compiler/lib/src/js_emitter/native_emitter.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.js_emitter;
 
 class NativeEmitter {
 
   final Map<Element, ClassBuilder> cachedBuilders;
 
@@ skipping 307 matching lines @@
     }
     builder.superName = superclass.name;
 
     bool hasFields = emitterTask.oldEmitter.classEmitter.emitFields(
         classElement, builder, classIsNative: true);
     int propertyCount = builder.properties.length;
     emitterTask.oldEmitter.classEmitter.emitCheckedClassSetters(
         classElement, builder);
     emitterTask.oldEmitter.classEmitter.emitInstanceMembers(
         classElement, builder);
-    emitterTask.oldEmitter.typeTestEmitter.emitIsTests(classElement, builder);
+    emitterTask.oldEmitter.classEmitter
+        .emitRuntimeTypeInformation(cls, builder);
 
     if (!hasFields &&
         builder.properties.length == propertyCount &&
         superclass is! MixinApplicationElement) {
       builder.isTrivial = true;
     }
 
     return builder;
   }
 
@@ skipping 146 matching lines @@
         targetOutput.add(';');
       }
       targetOutput.addBuffer(jsAst.prettyPrint(
           new jsAst.ExpressionStatement(init), compiler));
       targetOutput.add('\n');
     }
 
     targetOutput.add('\n');
   }
 }