Use the composed tree for the title attributes in Shadow DOM

Source/core/layout/HitTestResult.cpp

 /*
  * Copyright (C) 2006, 2008, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies)
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  *
 */
 
 #include "config.h"
 #include "core/layout/HitTestResult.h"
 
 #include "core/HTMLNames.h"
 #include "core/dom/DocumentMarkerController.h"
 #include "core/dom/NodeRenderingTraversal.h"
+#include "core/dom/shadow/ComposedTreeTraversal.h"
 #include "core/dom/shadow/ShadowRoot.h"
 #include "core/editing/FrameSelection.h"
 #include "core/fetch/ImageResource.h"
 #include "core/frame/LocalFrame.h"
 #include "core/html/HTMLAnchorElement.h"
 #include "core/html/HTMLImageElement.h"
 #include "core/html/HTMLInputElement.h"
 #include "core/html/HTMLMediaElement.h"
 #include "core/html/HTMLTextAreaElement.h"
 #include "core/html/parser/HTMLParserIdioms.h"
@@ skipping 175 matching lines @@
     if (LayoutObject* renderer = m_innerNonSharedNode->renderer())
         dir = renderer->style()->direction();
     return marker->description();
 }
 
 String HitTestResult::title(TextDirection& dir) const
 {
     dir = LTR;
     // Find the title in the nearest enclosing DOM node.
     // For <area> tags in image maps, walk the tree for the <area>, not the <img> using it.
-    for (Node* titleNode = m_innerNode.get(); titleNode; titleNode = titleNode->parentNode()) {
+    for (Node* titleNode = m_innerNode.get(); titleNode; titleNode = ComposedTreeTraversal::parent(*titleNode)) {
         if (titleNode->isElementNode()) {
             String title = toElement(titleNode)->title();
             if (!title.isNull()) {
                 if (LayoutObject* renderer = titleNode->renderer())
                     dir = renderer->style()->direction();
                 return title;
             }
         }
     }
     return String();
@@ skipping 232 matching lines @@
 {
     for (Node* node = m_innerNode.get(); node; node = NodeRenderingTraversal::parent(*node)) {
         if (node->isElementNode())
             return toElement(node);
     }
 
     return 0;
 }
 
 } // namespace blink