dart2js: add mangled-global-names embedded global to new emitter.

pkg/compiler/lib/src/js_emitter/new_emitter/model_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.new_js_emitter.model_emitter;
 
 import '../../dart2jslib.dart' show Compiler;
 import '../../js/js.dart' as js;
 import '../../js_backend/js_backend.dart' show
     JavaScriptBackend,
     Namer,
     ConstantEmitter;
 
 import 'package:_internal/compiler/js_lib/shared/embedded_names.dart' show
     DEFERRED_LIBRARY_URIS,
     DEFERRED_LIBRARY_HASHES,
     GET_TYPE_FROM_NAME,
     INITIALIZE_LOADED_HUNK,
     IS_HUNK_INITIALIZED,
-    IS_HUNK_LOADED;
+    IS_HUNK_LOADED,
+    MANGLED_GLOBAL_NAMES;
 
 import '../js_emitter.dart' show NativeGenerator;
 import '../model.dart';
 
 class ModelEmitter {
   final Compiler compiler;
   final Namer namer;
   final ConstantEmitter constantEmitter;
 
   JavaScriptBackend get backend => compiler.backend;
@@ skipping 119 matching lines @@
 
   js.Block emitEmbeddedGlobals(Map<String, List<Fragment>> loadMap) {
     List<js.Property> globals = <js.Property>[];
 
     if (loadMap.isNotEmpty) {
       globals.addAll(emitLoadUrisAndHashes(loadMap));
       globals.add(emitIsHunkLoadedFunction());
       globals.add(emitInitializeLoadedHunk());
     }
 
+    globals.add(new js.Property(js.string(MANGLED_GLOBAL_NAMES),
+                                js.js('Object.create(null)', [])));
+
     globals.add(emitGetTypeFromName());
     js.ObjectInitializer globalsObject = new js.ObjectInitializer(globals);
 
     List<js.Statement> statements =
         [new js.ExpressionStatement(
             new js.VariableDeclarationList(
                 [new js.VariableInitialization(
                     new js.VariableDeclaration("init", allowRename: false),
                     globalsObject)]))];
     return new js.Block(statements);
@@ skipping 407 matching lines @@
 
   var end = Date.now();
   print('Setup: ' + (end - start) + ' ms.');
 
   #main();  // Start main.
 
 }(Date.now(), #code)
 }""";
 
 }