Introduce positionForPoint() in LocalFrame class as replacement of visiblePositionForPoint()

Source/core/editing/VisibleSelection.cpp

 /*
  * Copyright (C) 2004, 2005, 2006 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 52 matching lines @@
     , m_isDirectional(isDirectional)
 {
     validate();
 }
 
 VisibleSelection::VisibleSelection(const PositionInComposedTree& base, const PositionInComposedTree& extent, TextAffinity affinity, bool isDirectional)
     : VisibleSelection(toPositionInDOMTree(base), toPositionInDOMTree(extent), affinity, isDirectional)
 {
 }
 
+VisibleSelection::VisibleSelection(const PositionWithAffinity& pos, bool isDirectional)
+    : VisibleSelection(pos.position(), pos.affinity(), isDirectional)
+{
+}
+
 VisibleSelection::VisibleSelection(const VisiblePosition& pos, bool isDirectional)
     : VisibleSelection(pos, pos, isDirectional)
 {
 }
 
 VisibleSelection::VisibleSelection(const VisiblePosition& base, const VisiblePosition& extent, bool isDirectional)
     : VisibleSelection(base.deepEquivalent(), extent.deepEquivalent(), base.affinity(), isDirectional)
 {
 }
 
@@ skipping 1161 matching lines @@
     sel.showTreeForThis();
 }
 
 void showTree(const blink::VisibleSelection* sel)
 {
     if (sel)
         sel->showTreeForThis();
 }
 
 #endif