Make CollectionIndexCache::setCachedNode() private

Source/core/html/CollectionIndexCache.h

 /*
  * Copyright (C) 2013 Apple Inc. All rights reserved.
  * Copyright (C) 2014 Samsung Electronics. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 45 matching lines @@
         if (cachedNode())
             return !cachedNodeIndex() && !nodeAt(collection, 1);
         return nodeAt(collection, 0) && !nodeAt(collection, 1);
     }
 
     unsigned nodeCount(const Collection&);
     NodeType* nodeAt(const Collection&, unsigned index);
 
     void invalidate();
 
-    ALWAYS_INLINE void setCachedNode(NodeType* node, unsigned index)
-    {
-        ASSERT(node);
-        m_currentNode = node;
-        m_cachedNodeIndex = index;
-    }
-
 private:
     NodeType* nodeBeforeOrAfterCachedNode(const Collection&, unsigned index, const ContainerNode& root);
     bool isLastNodeCloserThanLastOrCachedNode(unsigned index) const;
     bool isFirstNodeCloserThanCachedNode(unsigned index) const;
 
     ALWAYS_INLINE NodeType* cachedNode() const { return m_currentNode; }
     ALWAYS_INLINE unsigned cachedNodeIndex() const { ASSERT(cachedNode()); return m_cachedNodeIndex; }
+    ALWAYS_INLINE void setCachedNode(NodeType* node, unsigned index)
+    {
+        ASSERT(node);
+        m_currentNode = node;
+        m_cachedNodeIndex = index;
+    }
 
     ALWAYS_INLINE bool isCachedNodeCountValid() const { return m_isLengthCacheValid; }
     ALWAYS_INLINE unsigned cachedNodeCount() const { return m_cachedNodeCount; }
     ALWAYS_INLINE void setCachedNodeCount(unsigned length)
     {
         m_cachedNodeCount = length;
         m_isLengthCacheValid = true;
     }
 
     NodeType* m_currentNode;
@@ skipping 109 matching lines @@
     if (cachedNodeIndex() < index)
         return false;
 
     unsigned distanceFromCachedNode = cachedNodeIndex() - index;
     return index < distanceFromCachedNode;
 }
 
 } // namespace WebCore
 
 #endif // CollectionIndexCache_h