Use entities in native_emitter.dart

pkg/compiler/lib/src/js_emitter/full_emitter/emitter.dart

 // Copyright (c) 2014, 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 dart2js.js_emitter.full_emitter;
 
 import 'dart:collection' show HashMap;
 import 'dart:convert';
 
 import 'package:js_runtime/shared/embedded_names.dart' as embeddedNames;
@@ skipping 2167 matching lines @@
       ..add(const JsonEncoder.withIndent("  ").convert(mapping))
       ..close();
   }
 
   void invalidateCaches() {
     if (!compiler.options.hasIncrementalSupport) return;
     if (cachedElements.isEmpty) return;
     for (Element element in backend.codegenEnqueuer.newlyEnqueuedElements) {
       if (element.isInstanceMember) {
         cachedClassBuilders.remove(element.enclosingClass);
-
-        nativeEmitter.cachedBuilders.remove(element.enclosingClass);
       }
     }
   }
 }