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

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 141 matching lines @@
 
 VisibleSelectionInFlatTree createVisibleSelection(
     const VisiblePositionInFlatTree& pos,
     bool isDirectional) {
   DCHECK(pos.isValid());
   return createVisibleSelection(pos.deepEquivalent(), pos.deepEquivalent(),
                                 pos.affinity(), isDirectional);
 }
 
 VisibleSelectionInFlatTree createVisibleSelection(
-    const VisiblePositionInFlatTree& base,
-    const VisiblePositionInFlatTree& extent,
-    bool isDirectional) {
-  DCHECK(base.isValid());
-  DCHECK(extent.isValid());
-  // TODO(xiaochengh): We should check |base.isNotNull() || extent.isNull()|
-  // after all call sites have ensured that.
-  return createVisibleSelection(base.deepEquivalent(), extent.deepEquivalent(),
-                                base.affinity(), isDirectional);
-}
-
-VisibleSelectionInFlatTree createVisibleSelection(
     const EphemeralRangeInFlatTree& range,
     TextAffinity affinity,
     bool isDirectional) {
   DCHECK(!needsLayoutTreeUpdate(range.startPosition()));
   DCHECK(!needsLayoutTreeUpdate(range.endPosition()));
   SelectionInFlatTree::Builder builder;
   builder.setBaseAndExtent(range).setAffinity(affinity).setIsDirectional(
       isDirectional);
   return createVisibleSelection(builder.build());
 }
@@ skipping 769 matching lines @@
 
 void showTree(const blink::VisibleSelectionInFlatTree& sel) {
   sel.showTreeForThis();
 }
 
 void showTree(const blink::VisibleSelectionInFlatTree* sel) {
   if (sel)
     sel->showTreeForThis();
 }
 #endif