Get rid of unused member function toNormalizedRange() from FrameSelection and VisibleSelection class

Source/core/editing/VisibleSelection.h

 /*
  * Copyright (C) 2004 Apple Computer, 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 137 matching lines @@
     bool isDirectional() const { return m_isDirectional; }
     void setIsDirectional(bool isDirectional) { m_isDirectional = isDirectional; }
 
     void appendTrailingWhitespace();
 
     bool expandUsingGranularity(TextGranularity);
     bool expandUsingGranularityInComposedTree(TextGranularity);
 
     bool intersectsNode(Node*) const;
 
-    // FIXME: Most callers probably don't want these functions, but
-    // are using them for historical reasons. toNormalizedRange and
-    // toNormalizedEphemeralRange contracts the range around text, and
-    // moves the caret upstream before returning the range/positions.
-    PassRefPtrWillBeRawPtr<Range> toNormalizedRange() const;
+    // TODO(yosin) Most callers probably don't want these functions, but
+    // are using them for historical reasons. |toNormalizedEphemeralRange()|
+    // contracts the range around text, and moves the caret most backward
+    // visually equivalent position before returning the range/positions.
     EphemeralRange toNormalizedEphemeralRange() const;
     static EphemeralRange normalizeRange(const EphemeralRange&);
     static EphemeralRangeInComposedTree normalizeRange(const EphemeralRangeInComposedTree&);
 
     Element* rootEditableElement() const;
     bool isContentEditable() const;
     bool hasEditableStyle() const;
     bool isContentRichlyEditable() const;
     // Returns a shadow tree node for legacy shadow trees, a child of the
     // ShadowRoot node for new shadow trees, or 0 for non-shadow trees.
@@ skipping 88 matching lines @@
 
 } // namespace blink
 
 #ifndef NDEBUG
 // Outside the WebCore namespace for ease of invocation from gdb.
 void showTree(const blink::VisibleSelection&);
 void showTree(const blink::VisibleSelection*);
 #endif
 
 #endif // VisibleSelection_h