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

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

 /*
  * Copyright (C) 2005 Apple Computer, 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 317 matching lines @@
         m_endingPosition = m_downstreamEnd;
     }
 
     return false;
 }
 
 static Position firstEditablePositionInNode(Node* node)
 {
     DCHECK(node);
     Node* next = node;
-    while (next && !next->hasEditableStyle())
+    while (next && !hasEditableStyle(*next))
         next = NodeTraversal::next(*next, node);
     return next ? firstPositionInOrBeforeNode(next) : Position();
 }
 
 void DeleteSelectionCommand::removeNode(Node* node, EditingState* editingState, ShouldAssumeContentIsAlwaysEditable shouldAssumeContentIsAlwaysEditable)
 {
     if (!node)
         return;
 
     if (m_startRoot != m_endRoot && !(node->isDescendantOf(m_startRoot.get()) && node->isDescendantOf(m_endRoot.get()))) {
         // If a node is not in both the start and end editable roots, remove it only if its inside an editable region.
-        if (!node->parentNode()->hasEditableStyle()) {
+        if (!hasEditableStyle(*node->parentNode())) {
             // Don't remove non-editable atomic nodes.
             if (!node->hasChildren())
                 return;
             // Search this non-editable region for editable regions to empty.
             Node* child = node->firstChild();
             while (child) {
                 Node* nextChild = child->nextSibling();
                 removeNode(child, editingState, shouldAssumeContentIsAlwaysEditable);
                 if (editingState->isAborted())
                     return;
@@ skipping 600 matching lines @@
     visitor->trace(m_deleteIntoBlockquoteStyle);
     visitor->trace(m_startRoot);
     visitor->trace(m_endRoot);
     visitor->trace(m_startTableRow);
     visitor->trace(m_endTableRow);
     visitor->trace(m_temporaryPlaceholder);
     CompositeEditCommand::trace(visitor);
 }
 
 } // namespace blink