[Editing][DOM][CodeHealth] Move Node::*editable* functions to core/editing

third_party/WebKit/Source/web/WebNode.cpp

 /*
  * Copyright (C) 2009 Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 19 matching lines @@
 
 #include "public/web/WebNode.h"
 
 #include "bindings/core/v8/ExceptionStatePlaceholder.h"
 #include "core/dom/Document.h"
 #include "core/dom/Element.h"
 #include "core/dom/Node.h"
 #include "core/dom/NodeList.h"
 #include "core/dom/StaticNodeList.h"
 #include "core/dom/TagCollection.h"
+#include "core/editing/EditingUtilities.h"
 #include "core/editing/serializers/Serialization.h"
 #include "core/events/Event.h"
 #include "core/html/HTMLCollection.h"
 #include "core/html/HTMLElement.h"
 #include "core/layout/LayoutObject.h"
 #include "core/layout/LayoutPart.h"
 #include "modules/accessibility/AXObject.h"
 #include "modules/accessibility/AXObjectCacheImpl.h"
 #include "platform/Widget.h"
 #include "public/platform/WebString.h"
@@ skipping 210 matching lines @@
     m_private = node;
     return *this;
 }
 
 WebNode::operator Node*() const
 {
     return m_private.get();
 }
 
 } // namespace blink