DDC fixes on DDC

lib/src/js/printer.dart

 // Copyright (c) 2012, 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 js_ast;
 
 
 class JavaScriptPrintingOptions {
   final bool shouldCompressOutput;
   final bool minifyLocalVariables;
@@ skipping 1267 matching lines @@
  * Returns true, if the given node must be wrapped into braces when used
  * as then-statement in an [If] that has an else branch.
  */
 class DanglingElseVisitor extends BaseVisitor<bool> {
   JavaScriptPrintingContext context;
 
   DanglingElseVisitor(this.context);
 
   bool visitProgram(Program node) => false;
 
-  bool visitNode(Statement node) {
+  bool visitNode(Node node) {
     context.error("Forgot node: $node");
     return null;
   }
 
   bool visitBlock(Block node) => false;
   bool visitExpressionStatement(ExpressionStatement node) => false;
   bool visitEmptyStatement(EmptyStatement node) => false;
   bool visitIf(If node) {
     if (!node.hasElse) return true;
     return node.otherwise.accept(this);
@@ skipping 159 matching lines @@
         codes.add(nthLetter((n ~/ nameSpaceSize) % LETTERS));
       }
       codes.add(charCodes.$0 + digit);
       newName = new String.fromCharCodes(codes);
     }
     assert(new RegExp(r'[a-zA-Z][a-zA-Z0-9]*').hasMatch(newName));
     maps.last[oldName] = newName;
     return newName;
   }
 }