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

third_party/WebKit/Source/core/dom/Document.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2008, 2009, 2011, 2012 Google Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) Research In Motion Limited 2010-2011. All rights reserved.
@@ skipping 343 matching lines @@
     LayoutObject* layoutObject = focusedElement.layoutObject();
     if (!layoutObject || !layoutObject->isLayoutPart())
         return 0;
     return toLayoutPart(layoutObject)->widget();
 }
 
 static bool acceptsEditingFocus(const Element& element)
 {
     DCHECK(element.hasEditableStyle());
 
-    return element.document().frame() && element.rootEditableElement();
+    return element.document().frame() && rootEditableElement(element);
 }
 
 uint64_t Document::s_globalTreeVersion = 0;
 
 static bool s_threadedParsingEnabledForTesting = true;
 
 // This doesn't work with non-Document ExecutionContext.
 static void runAutofocusTask(ExecutionContext* context)
 {
     Document* document = toDocument(context);
@@ skipping 3183 matching lines @@
             if (oldWidget)
                 oldWidget->setFocus(false, params.type);
             else
                 view()->setFocus(false, params.type);
         }
     }
 
     if (newFocusedElement)
         updateStyleAndLayoutTreeForNode(newFocusedElement);
     if (newFocusedElement && newFocusedElement->isFocusable()) {
-        if (newFocusedElement->isRootEditableElement() && !acceptsEditingFocus(*newFocusedElement)) {
+        if (isRootEditableElement(*newFocusedElement) && !acceptsEditingFocus(*newFocusedElement)) {
             // delegate blocks focus change
             focusChangeBlocked = true;
             goto SetFocusedElementDone;
         }
         // Set focus on the new node
         m_focusedElement = newFocusedElement;
         setSequentialFocusNavigationStartingPoint(m_focusedElement.get());
 
         m_focusedElement->setFocus(true);
         // Element::setFocus for frames can dispatch events.
@@ skipping 27 matching lines @@
             // on it, probably when <rdar://problem/8503958> is m.
             m_focusedElement->dispatchFocusInEvent(EventTypeNames::DOMFocusIn, oldFocusedElement, params.type, params.sourceCapabilities); // DOM level 2 for compatibility.
 
             if (m_focusedElement != newFocusedElement) {
                 // handler shifted focus
                 focusChangeBlocked = true;
                 goto SetFocusedElementDone;
             }
         }
 
-        if (m_focusedElement->isRootEditableElement())
+        if (isRootEditableElement(*m_focusedElement))
             frame()->spellChecker().didBeginEditing(m_focusedElement.get());
 
         // eww, I suck. set the qt focus correctly
         // ### find a better place in the code for this
         if (view()) {
             Widget* focusWidget = widgetForElement(*m_focusedElement);
             if (focusWidget) {
                 // Make sure a widget has the right size before giving it focus.
                 // Otherwise, we are testing edge cases of the Widget code.
                 // Specifically, in WebCore this does not work well for text fields.
@@ skipping 2417 matching lines @@
 }
 
 void showLiveDocumentInstances()
 {
     WeakDocumentSet& set = liveDocumentSet();
     fprintf(stderr, "There are %u documents currently alive:\n", set.size());
     for (Document* document : set)
         fprintf(stderr, "- Document %p URL: %s\n", document, document->url().getString().utf8().data());
 }
 #endif