List literals in polymer_expressions

pkg/polymer_expressions/lib/visitor.dart

Index: pkg/polymer_expressions/lib/visitor.dart
diff --git a/pkg/polymer_expressions/lib/visitor.dart b/pkg/polymer_expressions/lib/visitor.dart
index cf2626e6ec45837f7531a1a131e335d5b43047bf..08a6a022aac7498305e659c6daf013dedf6ceadd 100644
--- a/pkg/polymer_expressions/lib/visitor.dart
+++ b/pkg/polymer_expressions/lib/visitor.dart
@@ -14,6 +14,7 @@ abstract class Visitor {
   visitIndex(Index i);
   visitInvoke(Invoke i);
   visitLiteral(Literal l);
+  visitListLiteral(ListLiteral l);
   visitMapLiteral(MapLiteral l);
   visitMapLiteralEntry(MapLiteralEntry l);
   visitIdentifier(Identifier i);
@@ -56,6 +57,13 @@ abstract class RecursiveVisitor extends Visitor {
 
   visitLiteral(Literal l) => visitExpression(l);
 
+  visitListLiteral(ListLiteral l) {
+    for (var i in l.items) {
+      visit(i);
+    }
+    visitExpression(l);
+  }
+
   visitMapLiteral(MapLiteral l) {
     for (var e in l.entries) {
       visit(e);