Do not use Node in FocusController

third_party/WebKit/Source/core/dom/Element.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Peter Kelly (pmk@post.com)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2007 David Smith (catfish.man@gmail.com)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2012, 2013 Apple Inc. All rights reserved.
  *           (C) 2007 Eric Seidel (eric@webkit.org)
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 2343 matching lines @@
 
     document().updateLayoutIgnorePendingStylesheets();
     if (!isFocusable())
         return;
 
     if (authorShadowRoot() && authorShadowRoot()->delegatesFocus()) {
         if (containsIncludingShadowDOM(document().focusedElement()))
             return;
 
         // Slide the focus to its inner node.
-        Element* next = document().page()->focusController().findFocusableElement(WebFocusTypeForward, *this);
-        if (next && containsIncludingShadowDOM(next)) {
-            next->focus(FocusParams(SelectionBehaviorOnFocus::Reset, WebFocusTypeForward, nullptr));
+        Element* found = document().page()->focusController().findFocusableElementInShadowHost(*this);
+        if (found && containsIncludingShadowDOM(found)) {
+            found->focus(FocusParams(SelectionBehaviorOnFocus::Reset, WebFocusTypeForward, nullptr));
             return;
         }
     }
 
     RefPtrWillBeRawPtr<Node> protect(this);
     if (!document().page()->focusController().setFocusedElement(this, document().frame(), params))
         return;
 
     if (document().focusedElement() == this && UserGestureIndicator::processedUserGestureSinceLoad()) {
         // Bring up the keyboard in the context of anything triggered by a user
@@ skipping 1262 matching lines @@
 {
 #if ENABLE(OILPAN)
     if (hasRareData())
         visitor->trace(elementRareData());
     visitor->trace(m_elementData);
 #endif
     ContainerNode::trace(visitor);
 }
 
 } // namespace blink