Rename childNodeCount() / childNode() methods for clarity

Source/core/page/DOMSelection.cpp

 /*
  * Copyright (C) 2007, 2009 Apple Inc. All rights reserved.
  * Copyright (C) 2012 Google 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.
@@ skipping 318 matching lines @@
 
     if (!node) {
         exceptionState.throwDOMException(TypeMismatchError, "The node provided is invalid.");
         return;
     }
 
     if (offset < 0) {
         exceptionState.throwDOMException(IndexSizeError, String::number(offset) + " is not a valid offset.");
         return;
     }
-    if (offset > (node->offsetInCharacters() ? caretMaxOffset(node) : (int)node->childNodeCount())) {
+    if (offset > (node->offsetInCharacters() ? caretMaxOffset(node) : (int)node->countChildren())) {
         exceptionState.throwDOMException(IndexSizeError, String::number(offset) + " is larger than the given node's length.");
         return;
     }
 
     if (!isValidForPosition(node))
         return;
 
     // FIXME: Eliminate legacy editing positions
     m_frame->selection().setExtent(VisiblePosition(createLegacyEditingPosition(node, offset), DOWNSTREAM));
 }
@@ skipping 124 matching lines @@
 
     return allowPartial || n->isTextNode();
 }
 
 void DOMSelection::selectAllChildren(Node* n, ExceptionState& exceptionState)
 {
     if (!n)
         return;
 
     // This doesn't (and shouldn't) select text node characters.
-    setBaseAndExtent(n, 0, n, n->childNodeCount(), exceptionState);
+    setBaseAndExtent(n, 0, n, n->countChildren(), exceptionState);
 }
 
 String DOMSelection::toString()
 {
     if (!m_frame)
         return String();
 
     return plainText(m_frame->selection().selection().toNormalizedRange().get());
 }
 
@@ skipping 34 matching lines @@
 
 bool DOMSelection::isValidForPosition(Node* node) const
 {
     ASSERT(m_frame);
     if (!node)
         return true;
     return node->document() == m_frame->document();
 }
 
 } // namespace WebCore