Update elements, nodes and visitors for serialization.

pkg/compiler/lib/src/tree/prettyprint.dart

Index: pkg/compiler/lib/src/tree/prettyprint.dart
diff --git a/pkg/compiler/lib/src/tree/prettyprint.dart b/pkg/compiler/lib/src/tree/prettyprint.dart
index 0fc2fa574323d806a84c7365db1278097699e69b..dceffaf6f1112b4b5270757417efbd003eb58437 100644
--- a/pkg/compiler/lib/src/tree/prettyprint.dart
+++ b/pkg/compiler/lib/src/tree/prettyprint.dart
@@ -122,14 +122,19 @@ class PrettyPrinter extends Indentation with Tagging<Node> implements Visitor {
     visitNodeWithChildren(node, "For");
   }
 
+  visitForIn(ForIn node) {
+    node.visitChildren(this);
+    closeNode();
+  }
+
   visitAsyncForIn(AsyncForIn node) {
     openNode(node, "AsyncForIn");
+    visitForIn(node);
   }
 
   visitSyncForIn(SyncForIn node) {
-    openNode(node, "ForIn");
-    node.visitChildren(this);
-    closeNode();
+    openNode(node, "SyncForIn");
+    visitForIn(node);
   }
 
   visitFunctionDeclaration(FunctionDeclaration node) {