Support while loop in analyzer2dart.

pkg/analyzer2dart/lib/src/cps_generator.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 analyzer2dart.cps_generator;
 
 import 'package:analyzer/analyzer.dart';
 
 import 'package:compiler/implementation/dart_types.dart' as dart2js;
 import 'package:compiler/implementation/elements/elements.dart' as dart2js;
@@ skipping 299 matching lines @@
     if (node.variables != null) {
       buildInitializer = subbuild(node.variables);
     } else {
       buildInitializer = subbuild(node.initialization);
     }
     irBuilder.buildFor(buildInitializer: buildInitializer,
                        buildCondition: subbuild(node.condition),
                        buildBody: subbuild(node.body),
                        buildUpdate: subbuildSequence(node.updaters));
   }
+
+  @override
+  visitWhileStatement(WhileStatement node) {
+    // TODO(johnniwinther): Support `while` as a jump target.
+    irBuilder.buildWhile(buildCondition: subbuild(node.condition),
+                         buildBody: subbuild(node.body));
+  }
 }