Do not use Node in FocusController

third_party/WebKit/Source/core/input/EventHandler.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2012 Digia Plc. and/or its subsidiary(-ies)
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
@@ skipping 1698 matching lines @@
     if (element.authorShadowRoot() && element.authorShadowRoot()->delegatesFocus()) {
         Document* doc = m_frame->document();
         if (element.containsIncludingShadowDOM(doc->focusedElement())) {
             // If the inner element is already focused, do nothing.
             return true;
         }
 
         // If the host has a focusable inner element, focus it. Otherwise, the host takes focus.
         Page* page = m_frame->page();
         ASSERT(page);
-        Element* next = page->focusController().findFocusableElement(WebFocusTypeForward, *element.authorShadowRoot());
-        if (next && element.containsIncludingShadowDOM(next)) {
+        Element* found = page->focusController().findFocusableElementInShadowHost(element);
+        if (found && element.containsIncludingShadowDOM(found)) {
             // Use WebFocusTypeForward instead of WebFocusTypeMouse here to mean the focus has slided.
-            next->focus(FocusParams(SelectionBehaviorOnFocus::Reset, WebFocusTypeForward, nullptr));
+            found->focus(FocusParams(SelectionBehaviorOnFocus::Reset, WebFocusTypeForward, nullptr));
             return true;
         }
     }
     return false;
 }
 
 namespace {
 
 ScrollResult scrollAreaWithWheelEvent(const PlatformWheelEvent& event, ScrollableArea& scrollableArea)
 {
@@ skipping 2241 matching lines @@
 PlatformEvent::Modifiers EventHandler::accessKeyModifiers()
 {
 #if OS(MACOSX)
     return static_cast<PlatformEvent::Modifiers>(PlatformEvent::CtrlKey | PlatformEvent::AltKey);
 #else
     return PlatformEvent::AltKey;
 #endif
 }
 
 } // namespace blink