Discard hidden articles when using fast path

java/org/chromium/distiller/DomUtil.java

Index: java/org/chromium/distiller/DomUtil.java
diff --git a/java/org/chromium/distiller/DomUtil.java b/java/org/chromium/distiller/DomUtil.java
index d0bcb1bfd7330c1cc8c56be59fdbc6320918284f..da40ec73988557319e703b5314bb7f72d2e7cede 100644
--- a/java/org/chromium/distiller/DomUtil.java
+++ b/java/org/chromium/distiller/DomUtil.java
@@ -181,6 +181,18 @@ public class DomUtil {
     }
 
     /**
+     * Get the nearest common ancestor of nodes.
+     */
+    public static Node getNearestCommonAncestor(final List<Element> ns) {
+        if (ns.size() == 0) return null;
+        Node parent = ns.get(0);
+        for (int i = 1; i < ns.size(); i++) {
+            parent = getNearestCommonAncestor(parent, ns.get(i));
+        }
+        return parent;
+    }
+
+    /**
      * Get all text from a tree/sub-tree.
      * @param node The root of the tree.
      * @return The text contained in this tree.