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

third_party/WebKit/Source/core/editing/commands/RemoveNodeCommand.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
@@ skipping 46 matching lines @@
     // and event handlers may break the document. We check the document state
     // here in order to prevent further processing in bad situation.
     ABORT_EDITING_COMMAND_IF(!m_node->document().frame());
     ABORT_EDITING_COMMAND_IF(!m_node->document().documentElement());
 }
 
 void RemoveNodeCommand::doUnapply()
 {
     ContainerNode* parent = m_parent.release();
     Node* refChild = m_refChild.release();
-    if (!parent || !parent->hasEditableStyle())
+    if (!parent || !hasEditableStyle(*parent))
         return;
 
     parent->insertBefore(m_node.get(), refChild, IGNORE_EXCEPTION);
 }
 
 DEFINE_TRACE(RemoveNodeCommand)
 {
     visitor->trace(m_node);
     visitor->trace(m_parent);
     visitor->trace(m_refChild);
     SimpleEditCommand::trace(visitor);
 }
 
 } // namespace blink