Generate prettier loops.

frog/leg/scanner/listener.dart

Index: frog/leg/scanner/listener.dart
diff --git a/frog/leg/scanner/listener.dart b/frog/leg/scanner/listener.dart
index 768bd5ff01e3e0b63ac697d5db553315a230b77a..7b973b6352d1f52fe328b7a28a3ecf5e1d348e20 100644
--- a/frog/leg/scanner/listener.dart
+++ b/frog/leg/scanner/listener.dart
@@ -82,7 +82,7 @@ class Listener {
                        Token beginToken, Token endToken) {
   }
 
-  void endForInStatement(Token beginToken, Token inKeyword, Token endToken) {
+  void endForIn(Token beginToken, Token inKeyword, Token endToken) {
   }
 
   void beginFunction(Token token) {
@@ -1374,11 +1374,11 @@ class NodeListener extends ElementListener {
                                     modifiers, null, null));
   }
 
-  void endForInStatement(Token beginToken, Token inKeyword, Token endToken) {
+  void endForIn(Token beginToken, Token inKeyword, Token endToken) {
     Statement body = popNode();
     Expression expression = popNode();
     Node declaredIdentifier = popNode();
-    pushNode(new ForInStatement(declaredIdentifier, expression, body,
+    pushNode(new ForIn(declaredIdentifier, expression, body,
                                 beginToken, inKeyword));
   }