Introduce createRange(const EphemeralRange&)

Source/core/editing/spellcheck/TextCheckingHelper.cpp

 /*
  * Copyright (C) 2006, 2007 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 147 matching lines @@
 {
     ASSERT(m_checkingRange);
     if (!m_paragraphRange)
         m_paragraphRange = expandToParagraphBoundary(checkingRange());
     return m_paragraphRange;
 }
 
 PassRefPtrWillBeRawPtr<Range> TextCheckingParagraph::subrange(int characterOffset, int characterCount) const
 {
     ASSERT(m_checkingRange);
-    EphemeralRange range = calculateCharacterSubrange(EphemeralRange(paragraphRange().get()), characterOffset, characterCount);
-    if (range.isNull())
-        return nullptr;
-    return Range::create(range.document(), range.startPosition(), range.endPosition());
+    return createRange(calculateCharacterSubrange(EphemeralRange(paragraphRange().get()), characterOffset, characterCount));
 }
 
 int TextCheckingParagraph::offsetTo(const Position& position, ExceptionState& exceptionState) const
 {
     ASSERT(m_checkingRange);
     RefPtrWillBeRawPtr<Range> range = offsetAsRange()->cloneRange();
     range->setEnd(position.computeContainerNode(), position.computeOffsetInContainerNode(), exceptionState);
     if (exceptionState.hadException())
         return 0;
     return TextIterator::rangeLength(range->startPosition(), range->endPosition());
@@ skipping 389 matching lines @@
         return false;
 
     const Settings* settings = frame->settings();
     if (!settings)
         return false;
 
     return settings->unifiedTextCheckerEnabled();
 }
 
 }