Make non-null VisibleSelections creatable only by createVisibleSelection[Deprecated]

third_party/WebKit/Source/core/editing/PendingSelection.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 58 matching lines @@
         // ending paint at middle of character.
         PositionInFlatTree endPosition = paintBlockCursor ? nextPositionOf(originalSelection.extent(), PositionMoveType::CodeUnit) : end;
         selection.setWithoutValidation(start, endPosition);
         return selection;
     }
 
     const VisiblePositionInFlatTree& visibleStart = createVisiblePosition(start, selectionType == SelectionType::RangeSelection ? TextAffinity::Downstream : affinity);
     if (paintBlockCursor) {
         VisiblePositionInFlatTree visibleExtent = createVisiblePosition(end, affinity);
         visibleExtent = nextPositionOf(visibleExtent, CanSkipOverEditingBoundary);
-        return VisibleSelectionInFlatTree(visibleStart, visibleExtent);
+        return createVisibleSelectionDeprecated(visibleStart, visibleExtent);
     }
     const VisiblePositionInFlatTree visibleEnd = createVisiblePosition(end, selectionType == SelectionType::RangeSelection ? TextAffinity::Upstream : affinity);
-    return VisibleSelectionInFlatTree(visibleStart, visibleEnd);
+    return createVisibleSelectionDeprecated(visibleStart, visibleEnd);
 }
 
 void PendingSelection::commit(LayoutView& layoutView)
 {
     if (!hasPendingSelection())
         return;
     DCHECK(!layoutView.needsLayout());
     m_hasPendingSelection = false;
 
     const VisibleSelectionInFlatTree& originalSelection = m_frameSelection->visibleSelection<EditingInFlatTreeStrategy>();
@@ skipping 41 matching lines @@
     DCHECK(layoutView == endLayoutObject->view());
     layoutView.setSelection(startLayoutObject, startPos.computeEditingOffset(), endLayoutObject, endPos.computeEditingOffset());
 }
 
 DEFINE_TRACE(PendingSelection)
 {
     visitor->trace(m_frameSelection);
 }
 
 } // namespace blink