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

third_party/WebKit/Source/core/editing/commands/SplitTextNodeCommand.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 34 matching lines @@
     // rather is based on how this code happens to work.
     DCHECK(m_text2);
     DCHECK_GT(m_text2->length(), 0u);
     DCHECK_GT(m_offset, 0u);
     DCHECK_LT(m_offset, m_text2->length());
 }
 
 void SplitTextNodeCommand::doApply(EditingState*)
 {
     ContainerNode* parent = m_text2->parentNode();
-    if (!parent || !parent->hasEditableStyle())
+    if (!parent || !hasEditableStyle(*parent))
         return;
 
     String prefixText = m_text2->substringData(0, m_offset, IGNORE_EXCEPTION);
     if (prefixText.isEmpty())
         return;
 
     m_text1 = Text::create(document(), prefixText);
     DCHECK(m_text1);
     document().markers().copyMarkers(m_text2.get(), 0, m_offset, m_text1.get(), 0);
 
     insertText1AndTrimText2();
 }
 
 void SplitTextNodeCommand::doUnapply()
 {
-    if (!m_text1 || !m_text1->hasEditableStyle())
+    if (!m_text1 || !hasEditableStyle(*m_text1))
         return;
 
     DCHECK_EQ(m_text1->document(), document());
 
     String prefixText = m_text1->data();
 
     m_text2->insertData(0, prefixText, ASSERT_NO_EXCEPTION);
     document().updateStyleAndLayout();
 
     document().markers().copyMarkers(m_text1.get(), 0, prefixText.length(), m_text2.get(), 0);
     m_text1->remove(ASSERT_NO_EXCEPTION);
 }
 
 void SplitTextNodeCommand::doReapply()
 {
     if (!m_text1 || !m_text2)
         return;
 
     ContainerNode* parent = m_text2->parentNode();
-    if (!parent || !parent->hasEditableStyle())
+    if (!parent || !hasEditableStyle(*parent))
         return;
 
     insertText1AndTrimText2();
 }
 
 void SplitTextNodeCommand::insertText1AndTrimText2()
 {
     TrackExceptionState exceptionState;
     m_text2->parentNode()->insertBefore(m_text1.get(), m_text2.get(), exceptionState);
     if (exceptionState.hadException())
         return;
     m_text2->deleteData(0, m_offset, exceptionState);
     document().updateStyleAndLayout();
 }
 
 DEFINE_TRACE(SplitTextNodeCommand)
 {
     visitor->trace(m_text1);
     visitor->trace(m_text2);
     SimpleEditCommand::trace(visitor);
 }
 
 } // namespace blink