dart2js: don't emit unneeded native info.

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

Index: pkg/compiler/lib/src/js_emitter/old_emitter/reflection_data_parser.dart
diff --git a/pkg/compiler/lib/src/js_emitter/old_emitter/reflection_data_parser.dart b/pkg/compiler/lib/src/js_emitter/old_emitter/reflection_data_parser.dart
index c59517884560e730e459013cddcc717afcb9498f..bcd542f46b569f3553c6d6eb4fcc7758e94aab53 100644
--- a/pkg/compiler/lib/src/js_emitter/old_emitter/reflection_data_parser.dart
+++ b/pkg/compiler/lib/src/js_emitter/old_emitter/reflection_data_parser.dart
@@ -19,7 +19,7 @@ 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;
@@ -415,7 +415,7 @@ jsAst.Expression getReflectionDataParser(OldEmitter oldEmitter,
 }''', {'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});