[Editing][DOM][CodeHealth] Make Node::hasEditableStyle global functions.

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

 /*
  * Copyright (C) 2005, 2006, 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
@@ skipping 20 matching lines @@
 
 AppendNodeCommand::AppendNodeCommand(ContainerNode* parent, Node* node)
     : SimpleEditCommand(parent->document())
     , m_parent(parent)
     , m_node(node)
 {
     DCHECK(m_parent);
     DCHECK(m_node);
     DCHECK(!m_node->parentNode()) << m_node;
 
-    DCHECK(m_parent->hasEditableStyle() || !m_parent->inActiveDocument()) << m_parent;
+    DCHECK(hasEditableStyle(*m_parent) || !m_parent->inActiveDocument()) << m_parent;
 }
 
 void AppendNodeCommand::doApply(EditingState*)
 {
-    if (!m_parent->hasEditableStyle() && m_parent->inActiveDocument())
+    if (!hasEditableStyle(*m_parent) && m_parent->inActiveDocument())
         return;
 
     m_parent->appendChild(m_node.get(), IGNORE_EXCEPTION);
 }
 
 void AppendNodeCommand::doUnapply()
 {
-    if (!m_parent->hasEditableStyle())
+    if (!hasEditableStyle(*m_parent))
         return;
 
     m_node->remove(IGNORE_EXCEPTION);
 }
 
 DEFINE_TRACE(AppendNodeCommand)
 {
     visitor->trace(m_parent);
     visitor->trace(m_node);
     SimpleEditCommand::trace(visitor);
 }
 
 } // namespace blink