Discard hidden articles when using fast path

java/org/chromium/distiller/ContentExtractor.java

Index: java/org/chromium/distiller/ContentExtractor.java
diff --git a/java/org/chromium/distiller/ContentExtractor.java b/java/org/chromium/distiller/ContentExtractor.java
index 4a8f8bd8dbee9acff98fbbc9084f7f5d8b4626fe..7d16a774dd4360a4ce2015ed5296b466d386e969 100644
--- a/java/org/chromium/distiller/ContentExtractor.java
+++ b/java/org/chromium/distiller/ContentExtractor.java
@@ -162,35 +162,13 @@ public class ContentExtractor {
     }
 
     /**
-     * Get the element of the main article, if any.
-     * @return An element of article (not necessarily the html5 article element).
-     */
-    private Element getArticleElement(Element root) {
-        NodeList<Element> allArticles = root.getElementsByTagName("ARTICLE");
-        // Having multiple article elements usually indicates a bad case for this shortcut.
-        // TODO(wychen): some sites exclude things like title and author in article element.
-        if (allArticles.getLength() == 1) {
-            return allArticles.getItem(0);
-        }
-        // Note that the CSS property matching is case sensitive, and "Article" is the correct
-        // capitalization.
-        String query = "[itemscope][itemtype*=\"Article\"],[itemscope][itemtype*=\"Post\"]";
-        allArticles = DomUtil.querySelectorAll(root, query);
-        // It is commonly seen that the article is wrapped separately or in multiple layers.
-        if (allArticles.getLength() > 0) {
-            return Element.as(DomUtil.getNearestCommonAncestor(allArticles));
-        }
-        return null;
-    }
-
-    /**
      * Converts the original HTML page into a WebDocument for analysis.
      */
     private WebDocumentInfo createWebDocumentInfoFromPage() {
         WebDocumentInfo info = new WebDocumentInfo();
         WebDocumentBuilder documentBuilder = new WebDocumentBuilder();
         DomConverter converter = new DomConverter(documentBuilder);
-        Element walkerRoot = getArticleElement(documentElement);
+        Element walkerRoot = DomUtil.getArticleElement(documentElement);
         if (walkerRoot == null) {
             walkerRoot = documentElement;
         }