Less inequivalence on Hello World!

pkg/compiler/lib/src/js_emitter/model.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;
 
 import '../constants/values.dart' show ConstantValue;
 import '../deferred_load.dart' show OutputUnit;
 import '../elements/entities.dart';
 import '../js/js.dart' as js show Expression, Name, Statement, TokenFinalizer;
+import '../js/js_debug.dart' as js show nodeToString;
 import 'js_emitter.dart' show MetadataCollector;
 
 class Program {
   final List<Fragment> fragments;
   final List<Holder> holders;
   final bool outputContainsConstantList;
   final bool needsNativeSupport;
   final bool hasIsolateSupport;
   final bool hasSoftDeferredClasses;
 
@@ skipping 455 matching lines @@
 
   bool get isStatic => false;
 }
 
 /// A method that is generated by the backend and has not direct correspondence
 /// to a method in the original Dart program. Examples are getter and setter
 /// stubs and stubs to dispatch calls to methods with optional parameters.
 class StubMethod extends Method {
   StubMethod(js.Name name, js.Expression code, {MemberEntity element})
       : super(element, name, code);
+
+  String toString() {
+    return 'stub[name=${name},element=${element},code=${js.nodeToString(code)}]';
+  }
 }
 
 /// A stub that adapts and redirects to the main method (the one containing)
 /// the actual code.
 ///
 /// For example, given a method `foo$2(x, [y: 499])` a possible parameter
 /// stub-method could be `foo$1(x) => foo$2(x, 499)`.
 ///
 /// ParameterStubMethods are always attached to (static or instance) methods.
 class ParameterStubMethod extends StubMethod {
@@ skipping 34 matching lines @@
       : super(element, name, code, parameterStubs, callName,
             needsTearOff: needsTearOff,
             tearOffName: tearOffName,
             canBeApplied: canBeApplied,
             canBeReflected: canBeReflected,
             requiredParameterCount: requiredParameterCount,
             optionalParameterDefaultValues: optionalParameterDefaultValues,
             functionType: functionType);
 
   bool get isStatic => true;
+
+  String toString() {
+    return 'static_method[name=${name},element=${element}}]';
+  }
 }
 
 class StaticStubMethod extends StubMethod implements StaticMethod {
   Holder holder;
   StaticStubMethod(js.Name name, this.holder, js.Expression code)
       : super(name, code);
 }