Do not use Node in FocusController

third_party/WebKit/Source/core/page/FocusController.cpp

 /*
  * Copyright (C) 2006, 2007 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Nuanti Ltd.
  *
  * 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.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 798 matching lines @@
     if (caretBrowsing) {
         Position position = firstPositionInOrBeforeNode(element.get());
         VisibleSelection newSelection(position, position);
         frame->selection().setSelection(newSelection);
     }
 
     element->focus(FocusParams(SelectionBehaviorOnFocus::Reset, type, sourceCapabilities));
     return true;
 }
 
-Element* FocusController::findFocusableElement(WebFocusType type, Node& node)
+Element* FocusController::findFocusableElement(WebFocusType type, Element& element)
 {
     // FIXME: No spacial navigation code yet.
     ASSERT(type == WebFocusTypeForward || type == WebFocusTypeBackward);
-    Element* found = findFocusableElementAcrossFocusScopes(type, FocusNavigationScope::focusNavigationScopeOf(node), &node);
-    return found;
+    return findFocusableElementAcrossFocusScopes(type, FocusNavigationScope::focusNavigationScopeOf(element), &element);
+}
+
+Element* FocusController::findFocusableElementInShadowHost(const Element& shadowHost)
+{
+    ASSERT(shadowHost.authorShadowRoot());
+    return findFocusableElementAcrossFocusScopes(WebFocusTypeForward, FocusNavigationScope::ownedByShadowHost(shadowHost), nullptr);
 }
 
 static bool relinquishesEditingFocus(const Element& element)
 {
     ASSERT(element.hasEditableStyle());
     return element.document().frame() && element.rootEditableElement();
 }
 
 static void clearSelectionIfNeeded(LocalFrame* oldFocusedFrame, LocalFrame* newFocusedFrame, Element* newFocusedElement)
 {
@@ skipping 282 matching lines @@
     return consumed;
 }
 
 DEFINE_TRACE(FocusController)
 {
     visitor->trace(m_page);
     visitor->trace(m_focusedFrame);
 }
 
 } // namespace blink