Change hittest node to be scrollbar's parent when hittest include a scrollbar

third_party/WebKit/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,
@@ skipping 200 matching lines @@
   HTMLMapElement* map = imageElement->treeScope().getImageMap(
       imageElement->fastGetAttribute(usemapAttr));
   if (!map)
     return nullptr;
 
   return map->areaForPoint(localPoint(), imageElement->layoutObject());
 }
 
 void HitTestResult::setInnerNode(Node* n) {
   m_innerPossiblyPseudoNode = n;
-  if (n && n->isPseudoElement())
+  if (!n) {
+    m_innerNode = n;
+    return;
+  }
+  if (n->isPseudoElement())
     n = toPseudoElement(n)->findAssociatedNode();
   m_innerNode = n;
   if (HTMLAreaElement* area = imageAreaForImage()) {
     m_innerNode = area;
     m_innerPossiblyPseudoNode = area;
   }
 }
 
 void HitTestResult::setURLElement(Element* n) {
   m_innerURLElement = n;
@@ skipping 284 matching lines @@
   else if (isHTMLMapElement(m_innerNode))
     imageMapImageElement = toHTMLMapElement(m_innerNode)->imageElement();
 
   if (!imageMapImageElement)
     return m_innerNode.get();
 
   return imageMapImageElement;
 }
 
 }  // namespace blink