dart2js-kernel: Handle ir.TypeLiteral for type variables

pkg/compiler/lib/src/ssa/kernel_ast_adapter.dart

 // Copyright (c) 2016, 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 'package:js_runtime/shared/embedded_names.dart';
 import 'package:kernel/ast.dart' as ir;
 
 import '../constants/expressions.dart';
 import '../common.dart';
 import '../common/names.dart';
@@ skipping 371 matching lines @@
 
   ir.Procedure get assertThrow =>
       kernel.functions[_backend.helpers.assertThrow];
 
   ir.Procedure get setRuntimeTypeInfo =>
       kernel.functions[_backend.helpers.setRuntimeTypeInfo];
 
   TypeMask get assertThrowReturnType => TypeMaskFactory
       .inferredReturnTypeForElement(_backend.helpers.assertThrow, _compiler);
 
+  ir.Procedure get runtimeTypeToString =>
+      kernel.functions[_backend.helpers.runtimeTypeToString];
+
+  ir.Procedure get createRuntimeType =>
+      kernel.functions[_backend.helpers.createRuntimeType];
+
+  TypeMask get createRuntimeTypeReturnType =>
+      TypeMaskFactory.inferredReturnTypeForElement(
+          _backend.helpers.createRuntimeType, _compiler);
+
   ir.Class get objectClass => kernel.classes[_compiler.coreClasses.objectClass];
 
   ir.Procedure get currentIsolate =>
       kernel.functions[_backend.helpers.currentIsolate];
 
   ir.Procedure get callInIsolate =>
       kernel.functions[_backend.helpers.callInIsolate];
 
   bool isInForeignLibrary(ir.Member member) =>
       _backend.isForeign(getElement(member));
@@ skipping 431 matching lines @@
     astAdapter.reporter.internalError(
         CURRENT_ELEMENT_SPANNABLE, "Unexpected constant target: $element.");
     return null;
   }
 
   @override
   ConstantExpression visitStringLiteral(ir.StringLiteral node) {
     return new StringConstantExpression(node.value);
   }
 }