Add KernelCodegenWorkItem stub

pkg/compiler/lib/src/inferrer/type_graph_inferrer.dart

 // Copyright (c) 2013, 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 type_graph_inferrer;
 
 import 'dart:collection' show Queue;
 
 import '../compiler.dart' show Compiler;
 import '../elements/elements.dart';
@@ skipping 45 matching lines @@
   final ClosedWorldRefiner closedWorldRefiner;
 
   TypeGraphInferrer(this.compiler, this.closedWorld, this.closedWorldRefiner);
 
   String get name => 'Graph inferrer';
 
   CommonMasks get commonMasks => closedWorld.commonMasks;
 
   TypeMask get _dynamicType => commonMasks.dynamicType;
 
-  void analyzeMain(Element main) {
+  void analyzeMain(FunctionEntity main) {
     inferrer =
         new InferrerEngine(compiler, closedWorld, closedWorldRefiner, main);
     inferrer.runOverAllElements();
   }
 
   TypeMask getReturnTypeOfElement(Element element) {
     if (compiler.disableTypeInference) return _dynamicType;
     // Currently, closure calls return dynamic.
     if (element is! FunctionElement) return _dynamicType;
     return inferrer.types.getInferredTypeOf(element).type;
@@ skipping 59 matching lines @@
   bool isCalledOnce(Element element) {
     if (compiler.disableTypeInference) return false;
     MemberTypeInformation info = inferrer.types.getInferredTypeOf(element);
     return info.isCalledOnce();
   }
 
   void clear() {
     inferrer.clear();
   }
 }