dart2js-kernel: Handle ir.TypeLiteral for type variables

pkg/compiler/lib/src/ssa/builder_kernel.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:kernel/ast.dart' as ir;
 import 'package:kernel/text/ast_to_text.dart' show debugNodeToString;
 
 import '../closure.dart';
 import '../common.dart';
 import '../common/codegen.dart' show CodegenRegistry, CodegenWorkItem;
@@ skipping 979 matching lines @@
 
   @override
   void visitTypeLiteral(ir.TypeLiteral typeLiteral) {
     ir.DartType type = typeLiteral.type;
     if (type is ir.InterfaceType) {
       ConstantValue constant = astAdapter.getConstantForType(type);
       stack.add(graph.addConstant(constant, compiler));
       return;
     }
     if (type is ir.TypeParameterType) {
-      // TODO(27394): Load type parameter from current 'this' object.
-      defaultExpression(typeLiteral);
+      // TODO(sra): Convert the type logic here to use ir.DartType.
+      DartType dartType = astAdapter.getDartType(type);
+      dartType = localsHandler.substInContext(dartType);
+      HInstruction value = typeBuilder.analyzeTypeArgument(
+          dartType, sourceElement,
+          sourceInformation: null);
+      _pushStaticInvocation(astAdapter.runtimeTypeToString,
+          <HInstruction>[value], backend.stringType);
+      _pushStaticInvocation(astAdapter.createRuntimeType, <HInstruction>[pop()],
+          astAdapter.createRuntimeTypeReturnType);
       return;
     }
     // TODO(27394): 'dynamic' and function types observed. Where are they from?
     defaultExpression(typeLiteral);
     return;
   }
 
   @override
   void visitStaticGet(ir.StaticGet staticGet) {
     ir.Member staticTarget = staticGet.target;
@@ skipping 909 matching lines @@
     push(new HNot(popBoolified(), backend.boolType));
   }
 
   @override
   void visitStringConcatenation(ir.StringConcatenation stringConcat) {
     KernelStringBuilder stringBuilder = new KernelStringBuilder(this);
     stringConcat.accept(stringBuilder);
     stack.add(stringBuilder.result);
   }
 }