Fix TraversalSendMixin.visitDynamicPropertySet.

pkg/compiler/lib/src/resolution/semantic_visitor_mixins.dart

 // Copyright (c) 2015, 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.
 
 part of dart2js.semantics_visitor;
 
 /// Interface for bulk handling of a [Node] in a semantic visitor.
 abstract class BulkHandle<R, A> {
   /// Handle [node] either regardless of semantics or to report that [node] is
   /// unhandled. [message] contains a message template for the latter case:
@@ skipping 3874 matching lines @@
     return null;
   }
 
   @override
   R visitDynamicPropertySet(
       SendSet node,
       Node receiver,
       Selector selector,
       Node rhs,
       A arg) {
+    apply(receiver, arg);
     apply(rhs, arg);
     return null;
   }
 
   @override
   R visitDynamicTypeLiteralCompound(
       Send node,
       ConstantExpression constant,
       AssignmentOperator operator,
       Node rhs,
@@ skipping 6415 matching lines @@
       NewExpression node,
       ConstructorElement constructor,
       InterfaceType type,
       NodeList arguments,
       CallStructure callStructure,
       A arg) {
     return handleConstructorInvoke(
         node, constructor, type, arguments, callStructure, arg);
   }
 }