[Editing][CodeHealth] Make Node::rootEditableElement static

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 2407 matching lines @@
         // animations) is difficult, for now we match IE's heuristic and bring
         // up the keyboard if there's been any gesture since load.
         document().page()->chromeClient().showImeIfNeeded();
     }
 }
 
 void Element::updateFocusAppearance(SelectionBehaviorOnFocus selectionBehavior)
 {
     if (selectionBehavior == SelectionBehaviorOnFocus::None)
         return;
-    if (isRootEditableElement()) {
+    if (isRootEditableElement(*this)) {
         LocalFrame* frame = document().frame();
         if (!frame)
             return;
 
         // When focusing an editable element in an iframe, don't reset the selection if it already contains a selection.
         if (this == frame->selection().rootEditableElement())
             return;
 
         // FIXME: We should restore the previous selection if there is one.
         VisibleSelection newSelection = VisibleSelection(firstPositionInOrBeforeNode(this), TextAffinity::Downstream);
@@ skipping 19 matching lines @@
 }
 
 bool Element::supportsFocus() const
 {
     // FIXME: supportsFocus() can be called when layout is not up to date.
     // Logic that deals with the layoutObject should be moved to layoutObjectIsFocusable().
     // But supportsFocus must return true when the element is editable, or else
     // it won't be focusable. Furthermore, supportsFocus cannot just return true
     // always or else tabIndex() will change for all HTML elements.
     return hasElementFlag(TabIndexWasSetExplicitly)
-        || isRootEditableElement()
+        || isRootEditableElement(*this)
         || (isShadowHost(this) && authorShadowRoot() && authorShadowRoot()->delegatesFocus())
         || supportsSpatialNavigationFocus();
 }
 
 bool Element::supportsSpatialNavigationFocus() const
 {
     // This function checks whether the element satisfies the extended criteria
     // for the element to be focusable, introduced by spatial navigation feature,
     // i.e. checks if click or keyboard event handler is specified.
     // This is the way to make it possible to navigate to (focus) elements
@@ skipping 1259 matching lines @@
 
 DEFINE_TRACE_WRAPPERS(Element)
 {
     if (hasRareData()) {
         visitor->traceWrappers(elementRareData());
     }
     ContainerNode::traceWrappers(visitor);
 }
 
 } // namespace blink