dart2js: don't emit unneeded native info.

pkg/compiler/lib/src/js_emitter/old_emitter/reflection_data_parser.dart

 // Copyright (c) 2013, 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;
 
 // TODO(ahe): Share these with js_helper.dart.
 const FUNCTION_INDEX = 0;
 const NAME_INDEX = 1;
 const CALL_NAME_INDEX = 2;
 const REQUIRED_PARAMETER_INDEX = 3;
 const OPTIONAL_PARAMETER_INDEX = 4;
 const DEFAULT_ARGUMENTS_INDEX = 5;
 
 const bool VALIDATE_DATA = false;
 
 // TODO(zarah): Rename this when renaming this file.
 String get parseReflectionDataName => 'parseReflectionData';
 
 jsAst.Expression getReflectionDataParser(OldEmitter oldEmitter,
                                          JavaScriptBackend backend,
-                                         bool hasNativeClasses) {
+                                         bool needsNativeSupport) {
   Namer namer = backend.namer;
   Compiler compiler = backend.compiler;
   CodeEmitterTask emitter = backend.emitter;
 
   String reflectableField = namer.reflectableField;
   String reflectionInfoField = namer.reflectionInfoField;
   String reflectionNameField = namer.reflectionNameField;
   String metadataIndexField = namer.metadataIndexField;
   String defaultValuesField = namer.defaultValuesField;
   String methodsWithOptionalArgumentsField =
@@ skipping 375 matching lines @@
     #finishClassFunction;
 
     #trivialNsmHandlers;
 
     var properties = Object.keys(processedClasses.pending);
     for (var i = 0; i < properties.length; i++) finishClass(properties[i]);
   }
 }''', {'allClasses': allClassesAccess,
        'debugFastObjects': DEBUG_FAST_OBJECTS,
        'isTreeShakingDisabled': backend.isTreeShakingDisabled,
-       'finishClassFunction': oldEmitter.buildFinishClass(hasNativeClasses),
+       'finishClassFunction': oldEmitter.buildFinishClass(needsNativeSupport),
        'trivialNsmHandlers': oldEmitter.buildTrivialNsmHandlers(),
        'inCspMode': compiler.useContentSecurityPolicy,
        'notInCspMode': !compiler.useContentSecurityPolicy});
 
   List<jsAst.Statement> incrementalSupport = <jsAst.Statement>[];
   if (compiler.hasIncrementalSupport) {
     incrementalSupport.add(
         js.statement(
             '#.addStubs = addStubs;', [namer.accessIncrementalHelper]));
   }
@@ skipping 55 matching lines @@
 (function() {
   var result = $array[$index];
   if ($check) {
     throw new Error(
         name + ": expected value of type \'$type\' at index " + ($index) +
         " but got " + (typeof result));
   }
   return result;
 })()''';
 }