HitTestResult::innerElement should check its parent node for rendering and styling.

Source/core/dom/Document.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2008, 2009, 2011, 2012 Google Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) Research In Motion Limited 2010-2011. All rights reserved.
@@ skipping 71 matching lines @@
 #include "core/dom/EventListener.h"
 #include "core/dom/EventNames.h"
 #include "core/dom/ExceptionCode.h"
 #include "core/dom/ExceptionCodePlaceholder.h"
 #include "core/dom/HashChangeEvent.h"
 #include "core/dom/NameNodeList.h"
 #include "core/dom/NamedFlowCollection.h"
 #include "core/dom/NodeFilter.h"
 #include "core/dom/NodeIterator.h"
 #include "core/dom/NodeRareData.h"
+#include "core/dom/NodeRenderingTraversal.h"
 #include "core/dom/NodeTraversal.h"
 #include "core/dom/NodeWithIndex.h"
 #include "core/dom/PageTransitionEvent.h"
 #include "core/dom/PopStateEvent.h"
 #include "core/dom/ProcessingInstruction.h"
 #include "core/dom/QualifiedName.h"
 #include "core/dom/RegisteredEventListener.h"
 #include "core/dom/RequestAnimationFrameCallback.h"
 #include "core/dom/ScopedEventQueue.h"
 #include "core/dom/ScriptElement.h"
@@ skipping 3012 matching lines @@
         nodeInSubtree = focusedNode->isDescendantOf(node);
     else
         nodeInSubtree = (focusedNode == node) || focusedNode->isDescendantOf(node);
 
     if (nodeInSubtree)
         document()->focusedNodeRemoved();
 }
 
 void Document::hoveredNodeDetached(Node* node)
 {
-    if (!m_hoverNode || (node != m_hoverNode && (!m_hoverNode->isTextNode() || node != m_hoverNode->parentNode())))
+    if (!m_hoverNode)
         return;
 
-    m_hoverNode = node->parentNode();
+    NodeRenderingTraversal::ParentDetails details;
+    if (node != m_hoverNode && (!m_hoverNode->isTextNode() || node != NodeRenderingTraversal::parent(m_hoverNode.get(), &details)))
+        return;
+
+    m_hoverNode = NodeRenderingTraversal::parent(node, &details);
     while (m_hoverNode && !m_hoverNode->renderer())
-        m_hoverNode = m_hoverNode->parentNode();
+        m_hoverNode = m_hoverNode->parentOrShadowHostNode();

[hayato, 2013/06/03 09:03:47]

Shouldn't we use NodeRenderingTraversal::parent() here?

[tasak, 2013/06/03 11:18:25]

Done.

     if (frame())
         frame()->eventHandler()->scheduleHoverStateUpdate();
 }
 
 void Document::activeChainNodeDetached(Node* node)
 {
-    if (!m_activeElement || (node != m_activeElement && (!m_activeElement->isTextNode() || node != m_activeElement->parentNode())))
+    if (!m_activeElement)
         return;
 
-    m_activeElement = node->parentElement();
+    NodeRenderingTraversal::ParentDetails details;
+    if (node != m_activeElement && (!m_activeElement->isTextNode() || node != NodeRenderingTraversal::parent(m_activeElement.get(), &details)))
+        return;
+
+    Node* parent = NodeRenderingTraversal::parent(node, &details);
+    m_activeElement = parent && parent->isElementNode() ? toElement(parent) : 0;
     while (m_activeElement && !m_activeElement->renderer())
-        m_activeElement = m_activeElement->parentElement();
+        m_activeElement = m_activeElement->parentOrShadowHostElement();

[hayato, 2013/06/03 09:03:47]

Ditto.

Also looks like NodeRenderingTraversal should have parentElement().

[tasak, 2013/06/03 11:18:25]

Done.

 }
 
 const Vector<AnnotatedRegionValue>& Document::annotatedRegions() const
 {
     return m_annotatedRegions;
 }
 
 void Document::setAnnotatedRegions(const Vector<AnnotatedRegionValue>& regions)
 {
     m_annotatedRegions = regions;
@@ skipping 2495 matching lines @@
         return;
 
     Vector<RefPtr<Element> > associatedFormControls;
     copyToVector(m_associatedFormControls, associatedFormControls);
 
     frame()->page()->chrome().client()->didAssociateFormControls(associatedFormControls);
     m_associatedFormControls.clear();
 }
 
 } // namespace WebCore