dart2js cps: 'is' checks on types with type arguments.

pkg/compiler/lib/src/tree_ir/tree_ir_builder.dart

 // Copyright (c) 2014, 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 tree_ir_builder;
 
 import '../dart2jslib.dart' as dart2js;
 import '../dart_types.dart';
 import '../elements/elements.dart';
 import '../cps_ir/cps_ir_nodes.dart' as cps_ir;
@@ skipping 493 matching lines @@
     return Assign.makeStatement(variable, value, visit(node.body));
   }
 
   Statement visitDeclareFunction(cps_ir.DeclareFunction node) {
     Variable variable = addMutableVariable(node.variable);
     FunctionDefinition function = makeSubFunction(node.definition);
     return new FunctionDeclaration(variable, function, visit(node.body));
   }
 
   Statement visitTypeOperator(cps_ir.TypeOperator node) {
-    Expression receiver = getVariableUse(node.receiver);
+    Expression value = getVariableUse(node.value);
+    List<Expression> typeArgs = translateArguments(node.typeArguments);
     Expression concat =
-        new TypeOperator(receiver, node.type, isTypeTest: node.isTypeTest);
+        new TypeOperator(value, node.type, typeArgs,
+                         isTypeTest: node.isTypeTest);
     return continueWithExpression(node.continuation, concat);
   }
 
   Statement visitInvokeConstructor(cps_ir.InvokeConstructor node) {
     List<Expression> arguments = translateArguments(node.arguments);
     Expression invoke = new InvokeConstructor(
         node.type,
         node.target,
         node.selector,
         arguments);
@@ skipping 148 matching lines @@
 
   Statement visitSetStatic(cps_ir.SetStatic node) {
     SetStatic setStatic = new SetStatic(
         node.element,
         getVariableUse(node.value),
         node.sourceInformation);
     return new ExpressionStatement(setStatic, visit(node.body));
   }
 }