Introduce createRange(const EphemeralRange&)

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 224 matching lines @@
     if (isNone())
         return false;
     Position start = m_start.parentAnchoredEquivalent();
     Position end = m_end.parentAnchoredEquivalent();
     TrackExceptionState exceptionState;
     return Range::intersectsNode(node, start, end, exceptionState) && !exceptionState.hadException();
 }
 
 PassRefPtrWillBeRawPtr<Range> VisibleSelection::toNormalizedRange() const
 {
-    const EphemeralRange range = toNormalizedEphemeralRange();
-    if (range.isNull())
-        return nullptr;
-    return Range::create(range.document(), range.startPosition(), range.endPosition());
+    return createRange(toNormalizedEphemeralRange());
 }
 
 template <typename Strategy>
 static EphemeralRangeTemplate<Strategy> normalizeRangeAlgorithm(const EphemeralRangeTemplate<Strategy>& range)
 {
     ASSERT(range.isNotNull());
     range.document().updateLayoutIgnorePendingStylesheets();
 
     // TODO(yosin) We should not call |parentAnchoredEquivalent()|, it is
     // redundant.
@@ skipping 993 matching lines @@
     sel.showTreeForThis();
 }
 
 void showTree(const blink::VisibleSelection* sel)
 {
     if (sel)
         sel->showTreeForThis();
 }
 
 #endif