Towards compiling Hello World!

pkg/compiler/lib/src/js_emitter/native_emitter.dart

 // Copyright (c) 2012, 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.native_emitter;
 
 import '../common.dart';
 import '../common_elements.dart' show CommonElements;
 import '../elements/types.dart' show DartType, FunctionType;
 import '../elements/entities.dart';
@@ skipping 250 matching lines @@
         cls.callStubs.isEmpty &&
         !cls.superclass.isMixinApplication &&
         !cls.fields.any(needsAccessor);
   }
 
   void potentiallyConvertDartClosuresToJs(List<jsAst.Statement> statements,
       FunctionEntity member, List<jsAst.Parameter> stubParameters) {
     FunctionEntity converter = _commonElements.closureConverter;
     jsAst.Expression closureConverter =
         _emitterTask.staticFunctionAccess(converter);
-    _worldBuilder.forEachParameter(member, (DartType type, String name) {
+    _worldBuilder.forEachParameter(member, (DartType type, String name, _) {
       // If [name] is not in [stubParameters], then the parameter is an optional
       // parameter that was not provided for this stub.
       for (jsAst.Parameter stubParameter in stubParameters) {
         if (stubParameter.name == name) {
           type = type.unaliased;
           if (type.isFunctionType) {
             // The parameter type is a function type either directly or through
             // typedef(s).
             FunctionType functionType = type;
             int arity = functionType.parameterTypes.length;
@@ skipping 77 matching lines @@
     // satisfy a check against [element], in which case an interceptor must be
     // used.  We should also use an interceptor if the check can't be satisfied
     // by a native class in case we get a native instance that tries to spoof
     // the type info.  i.e the criteria for whether or not to use an interceptor
     // is whether the receiver can be native, not the type of the test.
     ClassEntity cls = element;
     if (_nativeData.isNativeOrExtendsNative(cls)) return true;
     return isSupertypeOfNativeClass(element);
   }
 }