Introduce isRenderedCharacter(Position) function

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 185 matching lines @@
 
     bool atStartOfTree() const;
     bool atEndOfTree() const;
 
     // These return useful visually equivalent positions.
     PositionAlgorithm<Strategy> upstream(EditingBoundaryCrossingRule = CannotCrossEditingBoundary) const;
     PositionAlgorithm<Strategy> downstream(EditingBoundaryCrossingRule = CannotCrossEditingBoundary) const;
 
     bool isCandidate() const;
     bool inRenderedText() const;
-    bool isRenderedCharacter() const;
 
     InlineBoxPosition computeInlineBoxPosition(EAffinity) const;
     InlineBoxPosition computeInlineBoxPosition(EAffinity, TextDirection primaryDirection) const;
 
     static bool hasRenderedNonAnonymousDescendantsWithHeight(LayoutObject*);
     static bool nodeIsUserSelectNone(Node*);
     static bool nodeIsUserSelectAll(const Node*);
     static Node* rootUserSelectAllForNode(Node*);
     static PositionAlgorithm<Strategy> beforeNode(Node* anchorNode);
     static PositionAlgorithm<Strategy> afterNode(Node* anchorNode);
@@ skipping 34 matching lines @@
     int m_offset;
     PositionAnchorType m_anchorType;
 };
 
 extern template class CORE_EXTERN_TEMPLATE_EXPORT PositionAlgorithm<EditingStrategy>;
 extern template class CORE_EXTERN_TEMPLATE_EXPORT PositionAlgorithm<EditingInComposedTreeStrategy>;
 
 using Position = PositionAlgorithm<EditingStrategy>;
 using PositionInComposedTree = PositionAlgorithm<EditingInComposedTreeStrategy>;
 
+// TODO(yosin) |isRenderedCharacter()| should be removed, and we should use
+// |VisiblePosition::characterAfter()| and |VisiblePosition::characterBefore()|.
+// TODO(yosin) We should move |isRenderedCharacter()| to "VisibleUnits.cpp",
+// since it is used only in "editing/commands/"
+CORE_EXPORT bool isRenderedCharacter(const Position&);
+
 template <typename Strategy>
 bool operator==(const PositionAlgorithm<Strategy>& a, const PositionAlgorithm<Strategy>& b)
 {
     if (a.isNull())
         return b.isNull();
 
     if (a.anchorNode() != b.anchorNode() || a.anchorType() != b.anchorType())
         return false;
 
     if (!a.isOffsetInAnchor()) {
@@ skipping 179 matching lines @@
 
 } // 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