Clean attributes of mRoot between tests properly

javatests/org/chromium/distiller/OpenGraphProtocolParserTest.java

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 package org.chromium.distiller;
 
 
 public class OpenGraphProtocolParserTest extends DomDistillerJsTestCase {
     public void testRequiredPropertiesAndDescriptionAndSiteName() {
         String expectedTitle = "Testing required OpenGraph Proptocol properties and optional Description of the document.";
@@ skipping 416 matching lines @@
 
         // Create the description property with the common "og" prefix, instead
         // of the customized "tstog" prefix.
         createMeta("og:description", "this description should be ignored");
 
         OpenGraphProtocolParser parser = OpenGraphProtocolParser.parse(mRoot);
         assertNotNull(parser);
         assertEquals("", parser.getDescription());
     }
 
-    @Override
-    protected void gwtSetUp() throws Exception {
-        super.gwtSetUp();
-
-        // Remove all attributes that specify prefix or namespace, so that each
-        // testcase starts with clean HTML and HEAD tags.  Otherwise. a testcase
-        // may run with the attributes set in a previous testcase, resulting in
-        // unexpected results.
-        mRoot.removeAttribute("prefix");
-        mRoot.removeAttribute("xmlns:tstog");
-        mRoot.removeAttribute("xmlns:tstpf");
-        mRoot.removeAttribute("xmlns:tsta");
-    }
-
     private void createDefaultTitle() {
         createMeta("og:title", "dummy title");
     }
 
     private void createCustomizedTitle() {
         createMeta("tstog:title", "dummy title");
     }
 
     private void createDefaultType() {
         createMeta("og:type", "website");
@@ skipping 20 matching lines @@
     }
 
     private void createDescription(String description, String prefix) {
         createMeta(prefix + ":description", description);
     }
 
     private void createMeta(String property, String content) {
         mHead.appendChild(TestUtil.createMetaProperty(property, content));
     }
 }