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

tests/compiler/dart2js/backend_dart/sexpr_unstringifier.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.
 
 // SExpressionUnstringifier implements the inverse operation to
 // [SExpressionStringifier].
 
 library sexpr_unstringifier;
 
 import 'package:compiler/src/constants/expressions.dart';
@@ skipping 546 matching lines @@
   TypeOperator parseTypeOperator() {
     tokens.consumeStart(TYPE_OPERATOR);
 
     String operator = tokens.read();
 
     Primitive recv = name2variable[tokens.read()];
     assert(recv != null);
 
     dart_types.DartType type = new DummyNamedType(tokens.read());
 
+    List<ir.Primitive> typeArguments = parsePrimitiveList();
+
     Continuation cont = name2variable[tokens.read()];
     assert(cont != null);
 
     tokens.consumeEnd();
-    return new TypeOperator(recv, type, cont, isTypeTest: operator == 'is');
+    return new TypeOperator(recv, type, typeArguments, cont,
+                            isTypeTest: operator == 'is');
   }
 
   /// (SetStatic field value body)
   SetStatic parseSetStatic() {
     tokens.consumeStart(SET_STATIC);
 
     Element fieldElement = new DummyElement(tokens.read());
     Primitive value = name2variable[tokens.read()];
     assert(value != null);
     Expression body = parseExpression();
@@ skipping 181 matching lines @@
   /// (GetStatic field)
   GetStatic parseGetStatic() {
     tokens.consumeStart(GET_STATIC);
 
     Element field = new DummyElement(tokens.read());
 
     tokens.consumeEnd();
     return new GetStatic(field, null);
   }
 }