Move a static member function hasRenderedNonAnonymousDescendantsWithHeight() out from PositionAlgori

Source/core/editing/Position.h

 /*
  * Copyright (C) 2004, 2006, 2008 Apple 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 179 matching lines @@
     // These return useful visually equivalent positions.
     PositionAlgorithm<Strategy> upstream(EditingBoundaryCrossingRule = CannotCrossEditingBoundary) const;
     PositionAlgorithm<Strategy> downstream(EditingBoundaryCrossingRule = CannotCrossEditingBoundary) const;
 
     bool isCandidate() const;
     bool inRenderedText() const;
 
     InlineBoxPosition computeInlineBoxPosition(TextAffinity) const;
     InlineBoxPosition computeInlineBoxPosition(TextAffinity, TextDirection primaryDirection) const;
 
-    static bool hasRenderedNonAnonymousDescendantsWithHeight(LayoutObject*);
     static bool nodeIsUserSelectAll(const Node*);
     static Node* rootUserSelectAllForNode(Node*);
     static PositionAlgorithm<Strategy> beforeNode(Node* anchorNode);
     static PositionAlgorithm<Strategy> afterNode(Node* anchorNode);
     static PositionAlgorithm<Strategy> inParentBeforeNode(const Node& anchorNode);
     static PositionAlgorithm<Strategy> inParentAfterNode(const Node& anchorNode);
     static int lastOffsetInNode(Node* anchorNode);
     static PositionAlgorithm<Strategy> firstPositionInNode(Node* anchorNode);
     static PositionAlgorithm<Strategy> lastPositionInNode(Node* anchorNode);
     static int minOffsetForNode(Node* anchorNode, int offset);
@@ skipping 224 matching lines @@
 {
     return position;
 }
 
 template <>
 inline PositionInComposedTree fromPositionInDOMTree<EditingInComposedTreeStrategy>(const Position& position)
 {
     return toPositionInComposedTree(position);
 }
 
+// TODO(yosin) We should move |hasRenderedNonAnonymousDescendantsWithHeight|
+// to "VisibleUnits.cpp" to reduce |LayoutObject| dependency in "Position.cpp"
+bool hasRenderedNonAnonymousDescendantsWithHeight(LayoutObject*);
+
 } // namespace blink
 
 #ifndef NDEBUG
 // Outside the WebCore namespace for ease of invocation from gdb.
 void showTree(const blink::Position&);
 void showTree(const blink::Position*);
 #endif
 
 #endif // Position_h