dart2js: support native classes in the new emitter.

pkg/compiler/lib/src/js_emitter/new_emitter/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.emitter;
 
 import '../program_builder.dart' show ProgramBuilder;
 import '../model.dart';
 import 'model_emitter.dart';
 import '../../common.dart';
 import '../../elements/elements.dart' show FieldElement;
 import '../../js/js.dart' as js;
 
-import '../../js_backend/js_backend.dart' show Namer, JavaScriptBackend;
+import '../../js_backend/js_backend.dart' show
+    JavaScriptBackend,
+    Namer;
+
+import '../js_emitter.dart' show
+    NativeEmitter;
+
 import '../js_emitter.dart' as emitterTask show
     Emitter;
 
 class Emitter implements emitterTask.Emitter {
   final Compiler _compiler;
   final Namer namer;
   final ModelEmitter _emitter;
 
-  Emitter(Compiler compiler, Namer namer)
+  Emitter(Compiler compiler, Namer namer, NativeEmitter nativeEmitter)
       : this._compiler = compiler,
         this.namer = namer,
-        _emitter = new ModelEmitter(compiler, namer);
+        _emitter = new ModelEmitter(compiler, namer, nativeEmitter);
 
   @override
   int emitProgram(ProgramBuilder programBuilder) {
     Program program = programBuilder.buildProgram();
     return _emitter.emitProgram(program);
   }
 
   // TODO(floitsch): copied from OldEmitter. Adjust or share.
   @override
   bool isConstantInlinedOrAlreadyEmitted(ConstantValue constant) {
@@ skipping 100 matching lines @@
   @override
   js.Expression typeAccess(Element element) {
     // TODO(floitsch): minify 'ensureResolved'.
     // TODO(floitsch): don't emit `ensureResolved` for eager classes.
     return js.js('#.ensureResolved()', _globalPropertyAccess(element));
   }
 
   @override
   void invalidateCaches() {}
 }