Make VisiblePosition constructor private

Source/core/editing/spellcheck/SpellChecker.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
  *
  * 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
@@ skipping 194 matching lines @@
     // topNode defines the whole range we want to operate on
     ContainerNode* topNode = highestEditableRoot(position);
     // TODO(yosin): |lastOffsetForEditing()| is wrong here if
     // |editingIgnoresContent(highestEditableRoot())| returns true, e.g. <table>
     spellingSearchEnd = Position::editingPositionOf(topNode, EditingStrategy::lastOffsetForEditing(topNode));
 
     // If spellingSearchRange starts in the middle of a word, advance to the
     // next word so we start checking at a word boundary. Going back by one char
     // and then forward by a word does the trick.
     if (startedWithSelection) {
-    VisiblePosition oneBeforeStart = previousPositionOf(VisiblePosition(spellingSearchStart));
+    VisiblePosition oneBeforeStart = previousPositionOf(createVisiblePosition(spellingSearchStart));
         if (oneBeforeStart.isNotNull())
             spellingSearchStart = endOfWord(oneBeforeStart).toParentAnchoredPosition();
         // else we were already at the start of the editable node
     }
 
     if (spellingSearchStart == spellingSearchEnd)
         return; // nothing to search in
 
     // We go to the end of our first range instead of the start of it, just to be sure
     // we don't get foiled by any word boundary problems at the start. It means we might
@@ skipping 712 matching lines @@
     m_spellCheckRequester->requestCheckingFor(SpellCheckRequest::create(TextCheckingTypeSpelling | TextCheckingTypeGrammar, TextCheckingProcessBatch, rangeToCheck, rangeToCheck));
 }
 
 DEFINE_TRACE(SpellChecker)
 {
     visitor->trace(m_frame);
     visitor->trace(m_spellCheckRequester);
 }
 
 } // namespace blink