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

third_party/WebKit/Source/core/editing/commands/SplitTextNodeContainingElementCommand.cpp

 /*
  * Copyright (C) 2005, 2008 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
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "core/editing/commands/SplitTextNodeContainingElementCommand.h"
 
 #include "core/dom/Element.h"
 #include "core/dom/Text.h"
+#include "core/editing/EditingUtilities.h"
 #include "core/layout/LayoutObject.h"
 #include "wtf/Assertions.h"
 
 namespace blink {
 
 SplitTextNodeContainingElementCommand::SplitTextNodeContainingElementCommand(Text* text, int offset)
     : CompositeEditCommand(text->document()), m_text(text), m_offset(offset)
 {
     DCHECK(m_text);
     DCHECK_GT(m_text->length(), 0u);
@@ skipping 22 matching lines @@
     splitElement(parent, m_text.get());
 }
 
 DEFINE_TRACE(SplitTextNodeContainingElementCommand)
 {
     visitor->trace(m_text);
     CompositeEditCommand::trace(visitor);
 }
 
 } // namespace blink