dart2js: add common names to mangledGlobalNames in 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 '../../dart_types.dart' show DartType;
+import '../../elements/elements.dart' show ClassElement;
 import '../../js/js.dart' as js;
 import '../../js_backend/js_backend.dart' show
     JavaScriptBackend,
     Namer,
     ConstantEmitter;
 
 import '../js_emitter.dart' show
     NativeEmitter;
 
 import 'package:_internal/compiler/js_lib/shared/embedded_names.dart' show
     DEFERRED_LIBRARY_URIS,
     DEFERRED_LIBRARY_HASHES,
     GET_TYPE_FROM_NAME,
     INITIALIZE_LOADED_HUNK,
     INTERCEPTORS_BY_TAG,
     IS_HUNK_INITIALIZED,
     IS_HUNK_LOADED,
     LEAF_TAGS,
     MANGLED_GLOBAL_NAMES,
     METADATA,
     TYPE_TO_INTERCEPTOR_MAP;
 
 import '../js_emitter.dart' show NativeGenerator, buildTearOffCode;
 import '../model.dart';
 
 
+
 class ModelEmitter {
   final Compiler compiler;
   final Namer namer;
   final ConstantEmitter constantEmitter;
   final NativeEmitter nativeEmitter;
 
   JavaScriptBackend get backend => compiler.backend;
 
   /// For deferred loading we communicate the initializers via this global var.
   static const String deferredInitializersGlobal =
@@ skipping 157 matching lines @@
       globals.addAll(emitLoadUrisAndHashes(program.loadMap));
       globals.add(emitIsHunkLoadedFunction());
       globals.add(emitInitializeLoadedHunk());
     }
 
     if (program.typeToInterceptorMap != null) {
       globals.add(new js.Property(js.string(TYPE_TO_INTERCEPTOR_MAP),
                                   program.typeToInterceptorMap));
     }
 
-    globals.add(new js.Property(js.string(MANGLED_GLOBAL_NAMES),
-                                js.js('Object.create(null)', [])));
+    globals.add(emitMangledGlobalNames());
 
     globals.add(emitGetTypeFromName());
 
     globals.add(emitMetadata(program));
 
     if (program.outputContainsNativeClasses) {
       globals.add(new js.Property(js.string(INTERCEPTORS_BY_TAG),
                                   js.js('Object.create(null)', [])));
       globals.add(new js.Property(js.string(LEAF_TAGS),
                                   js.js('Object.create(null)', [])));
     }
 
     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);
   }
 
+  js.Property emitMangledGlobalNames() {
+    List<js.Property> names = <js.Property>[];
+
+    // We want to keep the original names for the most common core classes when
+    // calling toString on them.
+    List<ClassElement> nativeClassesNeedingUnmangledName =
+        [compiler.intClass, compiler.doubleClass, compiler.numClass,
+         compiler.stringClass, compiler.boolClass, compiler.nullClass,
+         compiler.listClass];
+    nativeClassesNeedingUnmangledName.forEach((element) {
+        names.add(new js.Property(js.string(namer.getNameOfClass(element)),
+                                  js.string(element.name)));
+    });
+
+    return new js.Property(js.string(MANGLED_GLOBAL_NAMES),
+                           new js.ObjectInitializer(names));
+  }
+
   List<js.Property> emitLoadUrisAndHashes(Map<String, List<Fragment>> loadMap) {
     js.ArrayInitializer outputUris(List<Fragment> fragments) {
       return js.stringArray(fragments.map((DeferredFragment fragment) =>
           "${fragment.outputFileName}$deferredExtension"));
     }
     js.ArrayInitializer outputHashes(List<Fragment> fragments) {
       // TODO(floitsch): the hash must depend on the generated code.
       return js.numArray(
           fragments.map((DeferredFragment fragment) => fragment.hashCode));
     }
@@ skipping 640 matching lines @@
 
   var end = Date.now();
   print('Setup: ' + (end - start) + ' ms.');
 
   #main();  // Start main.
 
 }(Date.now(), #code)
 }""";
 
 }