Improved HTML parsing

editor/tools/plugins/com.google.dart.engine/src/com/google/dart/engine/html/ast/visitor/SimpleXmlVisitor.java

 /*
  * Copyright 2013, the Dart project authors.
  * 
  * Licensed under the Eclipse Public License v1.0 (the "License"); you may not use this file except
  * in compliance with the License. You may obtain a copy of the License at
  * 
  * http://www.eclipse.org/legal/epl-v10.html
  * 
  * Unless required by applicable law or agreed to in writing, software distributed under the License
  * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
  * or implied. See the License for the specific language governing permissions and limitations under
  * the License.
  */
 package com.google.dart.engine.html.ast.visitor;
 
+import com.google.dart.engine.html.ast.HtmlScriptTagNode;
 import com.google.dart.engine.html.ast.HtmlUnit;
 import com.google.dart.engine.html.ast.XmlAttributeNode;
 import com.google.dart.engine.html.ast.XmlTagNode;
 
 /**
  * Instances of the class {@code SimpleXmlVisitor} implement an AST visitor that will do nothing
  * when visiting an AST node. It is intended to be a superclass for classes that use the visitor
  * pattern primarily as a dispatch mechanism (and hence don't need to recursively visit a whole
  * structure) and that only need to visit a small number of node types.
  */
 public class SimpleXmlVisitor<R> implements XmlVisitor<R> {
+  @Override
+  public R visitHtmlScriptTagNode(HtmlScriptTagNode node) {
+    return null;
+  }
 
   @Override
   public R visitHtmlUnit(HtmlUnit htmlUnit) {
     return null;
   }
 
   @Override
   public R visitXmlAttributeNode(XmlAttributeNode xmlAttributeNode) {
     return null;
   }
 
   @Override
   public R visitXmlTagNode(XmlTagNode xmlTagNode) {
     return null;
   }
 }