Make DeleteSelectionCommand to use VisibleSelection::toNormalizedEphemeralRange() instead of toNorma

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 408 matching lines @@
     updatePositionForTextRemoval(node.get(), offset, count, m_endingPosition);
     updatePositionForTextRemoval(node.get(), offset, count, m_leadingWhitespace);
     updatePositionForTextRemoval(node.get(), offset, count, m_trailingWhitespace);
     updatePositionForTextRemoval(node.get(), offset, count, m_downstreamEnd);
 
     CompositeEditCommand::deleteTextFromNode(node, offset, count);
 }
 
 void DeleteSelectionCommand::makeStylingElementsDirectChildrenOfEditableRootToPreventStyleLoss()
 {
-    RefPtrWillBeRawPtr<Range> range = m_selectionToDelete.toNormalizedRange();
+    RefPtrWillBeRawPtr<Range> range = createRange(m_selectionToDelete.toNormalizedEphemeralRange());
     RefPtrWillBeRawPtr<Node> node = range->firstNode();
     while (node && node != range->pastLastNode()) {
         RefPtrWillBeRawPtr<Node> nextNode = NodeTraversal::next(*node);
         if (isHTMLStyleElement(*node) || isHTMLLinkElement(*node)) {
             nextNode = NodeTraversal::nextSkippingChildren(*node);
             RefPtrWillBeRawPtr<Element> rootEditableElement = node->rootEditableElement();
             if (rootEditableElement.get()) {
                 removeNode(node);
                 appendNode(node, rootEditableElement);
             }
@@ skipping 459 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