Rename childNodeCount() / childNode() methods for clarity

Source/core/editing/InsertParagraphSeparatorCommand.cpp

 /*
  * Copyright (C) 2005, 2006 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 262 matching lines @@
                 insertNodeBefore(listChildToInsert.get(), listChild);
             } else {
                 refNode = startBlock.get();
             }
         } else if (isFirstInBlock && nestNewBlock) {
             // startBlock should always have children, otherwise isLastInBlock would be true and it's handled above.
             ASSERT(startBlock->firstChild());
             refNode = startBlock->firstChild();
         }
         else if (insertionPosition.deprecatedNode() == startBlock && nestNewBlock) {
-            refNode = startBlock->childNode(insertionPosition.deprecatedEditingOffset());
+            refNode = startBlock->traverseToChildAt(insertionPosition.deprecatedEditingOffset());
             ASSERT(refNode); // must be true or we'd be in the end of block case
         } else
             refNode = insertionPosition.deprecatedNode();
 
         // find ending selection position easily before inserting the paragraph
         insertionPosition = insertionPosition.downstream();
 
         if (refNode)
             insertNodeBefore(blockToInsert, refNode);
 
@@ skipping 125 matching lines @@
             if (positionAfterSplit.deprecatedNode()->isTextNode())
                 insertTextIntoNode(toText(positionAfterSplit.containerNode()), 0, nonBreakingSpaceString());
         }
     }
 
     setEndingSelection(VisibleSelection(firstPositionInNode(blockToInsert.get()), DOWNSTREAM, endingSelection().isDirectional()));
     applyStyleAfterInsertion(startBlock.get());
 }
 
 } // namespace WebCore