Add tests for list and async marker

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

 // Copyright (c) 2017, 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.
 
 import '../common.dart';
 import '../common/names.dart';
 import '../compiler.dart';
 import '../constants/expressions.dart';
 import '../constants/values.dart';
 import '../elements/elements.dart';
@@ skipping 20 matching lines @@
 
   ast.Node computeMemberBody(covariant MemberElement member) {
     ResolvedAst resolvedAst = member.resolvedAst;
     ast.Node body;
     if (resolvedAst.kind == ResolvedAstKind.PARSED) {
       body = resolvedAst.body;
     }
     return body;
   }
 
-  void forEachParameter(
-      covariant MethodElement method, void f(Local parameter)) {
-    MethodElement implementation = method.implementation;
-    implementation.functionSignature
-        .forEachParameter((FormalElement _parameter) {
-      ParameterElement parameter = _parameter;
-      f(parameter);
-    });
-  }
-
   FunctionEntity lookupCallMethod(covariant ClassElement cls) {
     MethodElement callMethod = cls.lookupMember(Identifiers.call);
     if (callMethod == null) {
       callMethod = cls.lookupMember(Identifiers.noSuchMethod_);
     }
     return callMethod;
   }
 
   TypeInformation computeMemberTypeInformation(
       MemberEntity member, ast.Node body) {
@@ skipping 141 matching lines @@
   @override
   bool checkPhiNode(ast.Node node) {
     return true;
   }
 
   @override
   bool checkClassEntity(covariant ClassElement cls) {
     return cls.isDeclaration;
   }
 }