Only allow one shadowRoot.

sky/engine/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 78 matching lines @@
 
 FocusNavigationScope FocusNavigationScope::ownedByNonFocusableFocusScopeOwner(Node* node)
 {
     ASSERT(node);
     return FocusNavigationScope::ownedByShadowHost(node);
 }
 
 FocusNavigationScope FocusNavigationScope::ownedByShadowHost(Node* node)
 {
     ASSERT(isShadowHost(node));
-    return FocusNavigationScope(toElement(node)->shadow()->youngestShadowRoot());
+    return FocusNavigationScope(toElement(node)->shadow()->shadowRoot());
 }
 
 static inline void dispatchEventsOnWindowAndFocusedNode(Document* document, bool focused)
 {
     // If we have a focused node we should dispatch blur on it before we blur the window.
     // If we have a focused node we should dispatch focus on it after we focus the window.
     // https://bugs.webkit.org/show_bug.cgi?id=27105
 
     if (!focused && document->focusedElement()) {
         RefPtr<Element> focusedElement(document->focusedElement());
@@ skipping 479 matching lines @@
 {
     if (m_isActive == active)
         return;
 
     m_isActive = active;
 
     focusedOrMainFrame()->selection().pageActivationChanged();
 }
 
 } // namespace blink