dart2js: Use JS_GET_NAME instead of magic constant for catch-all function.

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:convert';
 import 'dart:collection' show HashMap;
 
 import 'package:js_runtime/shared/embedded_names.dart' as embeddedNames;
-import 'package:js_runtime/shared/embedded_names.dart' show JsBuiltin;
+import 'package:js_runtime/shared/embedded_names.dart' show
+    JsBuiltin,
+    JsGetName;
 
 import '../js_emitter.dart' hide Emitter;
 import '../js_emitter.dart' as js_emitter show Emitter;
 
 import '../model.dart';
 import '../program_builder/program_builder.dart';
 
 import '../../common.dart';
 
 import '../../constants/values.dart';
@@ skipping 2073 matching lines @@
     for (Element element in compiler.enqueuer.codegen.newlyEnqueuedElements) {
       if (element.isInstanceMember) {
         cachedClassBuilders.remove(element.enclosingClass);
 
         nativeEmitter.cachedBuilders.remove(element.enclosingClass);
 
       }
     }
   }
 }