dart2js: support native classes in the new emitter.

pkg/compiler/lib/src/js_emitter/code_emitter_task.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.
 
 part of dart2js.js_emitter;
 
 const USE_NEW_EMITTER = const bool.fromEnvironment("dart2js.use.new.emitter");
 
 /**
  * Generates the code for all used classes in the program. Static fields (even
@@ skipping 34 matching lines @@
       new Set<TypeVariableElement>();
 
   List<TypedefElement> typedefsNeededForReflection;
 
   JavaScriptBackend get backend => compiler.backend;
 
   CodeEmitterTask(Compiler compiler, Namer namer, bool generateSourceMap)
       : super(compiler),
         this.namer = namer,
         this.typeTestRegistry = new TypeTestRegistry(compiler) {
+    nativeEmitter = new NativeEmitter(this);
     oldEmitter = new OldEmitter(compiler, namer, generateSourceMap, this);
     emitter = USE_NEW_EMITTER
-        ? new new_js_emitter.Emitter(compiler, namer)
+        ? new new_js_emitter.Emitter(compiler, namer, nativeEmitter)
         : oldEmitter;
-    nativeEmitter = new NativeEmitter(this);
     metadataCollector = new MetadataCollector(compiler, emitter);
   }
 
   String get name => 'Code emitter';
 
   /// Returns the closure expression of a static function.
   jsAst.Expression isolateStaticClosureAccess(FunctionElement element) {
     return emitter.isolateStaticClosureAccess(element);
   }
 
@@ skipping 389 matching lines @@
   jsAst.Expression typeAccess(Element e);
 
   /// Returns the JS expression representing a function that returns 'null'
   jsAst.Expression generateFunctionThatReturnsNull();
 
   int compareConstants(ConstantValue a, ConstantValue b);
   bool isConstantInlinedOrAlreadyEmitted(ConstantValue constant);
 
   void invalidateCaches();
 }