Get rid of flat tree version of createVisibleSelection() taking two VisiblePosition

third_party/WebKit/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 80 matching lines @@
   DCHECK(!needsLayoutTreeUpdate(extent));
   // TODO(yosin): We should use |Builder::setBaseAndExtent()| once we get rid
   // of callers passing |base.istNull()| but |extent.isNotNull()|.
   SelectionInDOMTree::Builder builder;
   builder.setBaseAndExtentDeprecated(base, extent)
       .setAffinity(affinity)
       .setIsDirectional(isDirectional);
   return createVisibleSelection(builder.build());
 }
 
-VisibleSelection createVisibleSelection(const VisiblePosition& base,
-                                        const VisiblePosition& extent,
-                                        bool isDirectional) {
-  DCHECK(base.isValid());
-  DCHECK(extent.isValid());
-  return createVisibleSelection(base.deepEquivalent(), extent.deepEquivalent(),
-                                base.affinity(), isDirectional);
-}
-
 VisibleSelectionInFlatTree createVisibleSelection(
     const SelectionInFlatTree& selection) {
   return VisibleSelectionInFlatTree::create(selection);
 }
 
 template <typename Strategy>
 static SelectionType computeSelectionType(
     const PositionTemplate<Strategy>& start,
     const PositionTemplate<Strategy>& end) {
   if (start.isNull()) {
@@ skipping 749 matching lines @@
 
 void showTree(const blink::VisibleSelectionInFlatTree& sel) {
   sel.showTreeForThis();
 }
 
 void showTree(const blink::VisibleSelectionInFlatTree* sel) {
   if (sel)
     sel->showTreeForThis();
 }
 #endif