Create class AST nodes.

dart/frog/leg/scanner/scanner_task.dart

 // Copyright (c) 2011, 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.
 
 class ScannerTask extends CompilerTask {
   ScannerTask(Compiler compiler) : super(compiler);
   String get name() => 'Scanner';
 
   void scan(Script script) {
     measure(() {
       Link<Element> elements = scanElements(script.text);
       for (Link<Element> link = elements; !link.isEmpty(); link = link.tail) {
         compiler.universe.define(link.head);
       }
     });
   }
 
   Link<Element> scanElements(String text) {
     Token tokens = new StringScanner(text).tokenize();
     ElementListener listener = new ElementListener(compiler);
-    Parser parser = new Parser(listener);
+    PartialParser parser = new PartialParser(listener);
     parser.parseUnit(tokens);
     return listener.topLevelElements;
   }
 }