Fix broken test: closed_world2 test still uses rasta

pkg/compiler/lib/src/kernel/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.md file.
 
 import 'dart:collection' show Queue;
 
 import 'package:kernel/ast.dart' as ir;
 import 'package:kernel/verifier.dart' show CheckParentPointers;
 
 import '../common.dart';
@@ skipping 158 matching lines @@
           } else if (e.isTypedef) {
             // Ignored, typedefs are unaliased on use.
           } else {
             internalError(e, "Unhandled library member: $e");
           }
         });
         // The elements were inserted in reverse order as forEachLocalMember
         // above gives them in reversed order.
         classes.forEach(libraryNode.addClass);
         members.forEach(libraryNode.addMember);
+        // TODO(sigmund): include combinators, etc.
+        library.imports.forEach((ImportElement import) {
+          libraryNode.addDependency(new ir.LibraryDependency.import(
+              libraryToIr(import.importedLibrary)));
+        });
+        library.exports.forEach((ExportElement export) {
+          libraryNode.addDependency(new ir.LibraryDependency.export(
+              libraryToIr(export.exportedLibrary)));
+        });
       });
       return libraryNode;
     });
   }
 
   /// Compute a name for [cls]. We want to have unique names in a library, but
   /// mixin applications can lead to multiple classes with the same name. So
   /// for those we append `#` and a number.
   String computeName(ClassElement cls) {
     String name = cls.name;
@@ skipping 599 matching lines @@
 }
 
 class ConstructorTarget {
   final ConstructorElement element;
   final ResolutionDartType type;
 
   ConstructorTarget(this.element, this.type);
 
   String toString() => "ConstructorTarget($element, $type)";
 }