Do not use Node in FocusController

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

 /*
  * Copyright (C) 2006, 2007 Apple Inc. All rights reserved.
  *
  * 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 52 matching lines @@
     // one of its descendant frames, is currently focused.
     HTMLFrameOwnerElement* focusedFrameOwnerElement(LocalFrame& currentFrame) const;
 
     // Determines whether the provided Document has focus according to
     // http://www.w3.org/TR/html5/editing.html#dom-document-hasfocus
     bool isDocumentFocused(const Document&) const;
 
     bool setInitialFocus(WebFocusType);
     bool advanceFocus(WebFocusType type, InputDeviceCapabilities* sourceCapabilities = nullptr) { return advanceFocus(type, false, sourceCapabilities); }
     bool advanceFocusAcrossFrames(WebFocusType, RemoteFrame* from, LocalFrame* to, InputDeviceCapabilities* sourceCapabilities = nullptr);
-    Element* findFocusableElement(WebFocusType, Node&);
+    Element* findFocusableElementInShadowHost(const Element& shadowHost);
 
     bool setFocusedElement(Element*, PassRefPtrWillBeRawPtr<Frame>, const FocusParams&);
     // |setFocusedElement| variant with SelectionBehaviorOnFocus::None,
     // |WebFocusTypeNone, and null InputDeviceCapabilities.
     bool setFocusedElement(Element*, PassRefPtrWillBeRawPtr<Frame>);
 
     void setActive(bool);
     bool isActive() const { return m_isActive; }
 
     void setFocused(bool);
     bool isFocused() const { return m_isFocused; }
 
     DECLARE_TRACE();
 
 private:
     explicit FocusController(Page*);
 
+    Element* findFocusableElement(WebFocusType, Element&);
+
     bool advanceFocus(WebFocusType, bool initialFocus, InputDeviceCapabilities* sourceCapabilities = nullptr);
     bool advanceFocusDirectionally(WebFocusType);
     bool advanceFocusInDocumentOrder(LocalFrame*, Node* startingNode, WebFocusType, bool initialFocus, InputDeviceCapabilities* sourceCapabilities);
 
     bool advanceFocusDirectionallyInContainer(Node* container, const LayoutRect& startingRect, WebFocusType);
     void findFocusCandidateInContainer(Node& container, const LayoutRect& startingRect, WebFocusType, FocusCandidate& closest);
 
     RawPtrWillBeMember<Page> m_page;
     RefPtrWillBeMember<Frame> m_focusedFrame;
     bool m_isActive;
     bool m_isFocused;
     bool m_isChangingFocusedFrame;
 };
 
 } // namespace blink
 
 #endif // FocusController_h