Add CoreClasses

pkg/compiler/lib/src/js_emitter/startup_emitter/model_emitter.dart

 // Copyright (c) 2015, 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.startup_emitter.model_emitter;
 
 import 'dart:convert' show JsonEncoder;
 
 import 'package:js_runtime/shared/embedded_names.dart' show
     CLASS_FIELDS_EXTRACTOR,
@@ skipping 17 matching lines @@
     STATIC_FUNCTION_NAME_TO_CLOSURE,
     TYPE_TO_INTERCEPTOR_MAP,
     TYPES;
 
 import '../../common.dart';
 import '../../constants/values.dart' show
     ConstantValue,
     FunctionConstantValue;
 import '../../compiler.dart' show
     Compiler;
+import '../../core_types.dart' show
+    CoreClasses;
 import '../../elements/elements.dart' show
     ClassElement,
     FunctionElement;
 import '../../hash/sha1.dart' show
     Hasher;
 import '../../io/code_output.dart';
 import '../../io/line_column_provider.dart' show
     LineColumnCollector,
     LineColumnProvider;
 import '../../io/source_map_builder.dart' show
@@ skipping 353 matching lines @@
     // Json does not support comments, so we embed the explanation in the
     // data.
     mapping["_comment"] = "This mapping shows which compiled `.js` files are "
         "needed for a given deferred library import.";
     mapping.addAll(compiler.deferredLoadTask.computeDeferredMap());
     compiler.outputProvider(compiler.deferredMapUri.path, 'deferred_map')
       ..add(const JsonEncoder.withIndent("  ").convert(mapping))
       ..close();
   }
 }