Rename childNodeCount() / childNode() methods for clarity

Source/core/rendering/RenderObject.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  *           (C) 2004 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2009 Google Inc. All rights reserved.
  * Copyright (C) 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 3038 matching lines @@
 }
 
 int RenderObject::caretMinOffset() const
 {
     return 0;
 }
 
 int RenderObject::caretMaxOffset() const
 {
     if (isReplaced())
-        return node() ? max(1U, node()->childNodeCount()) : 1;
+        return node() ? max(1U, node()->countChildren()) : 1;
     if (isHR())
         return 1;
     return 0;
 }
 
 int RenderObject::previousOffset(int current) const
 {
     return current - 1;
 }
 
@@ skipping 230 matching lines @@
 {
     if (object1) {
         const WebCore::RenderObject* root = object1;
         while (root->parent())
             root = root->parent();
         root->showRenderTreeAndMark(object1, "*", object2, "-", 0);
     }
 }
 
 #endif