Introduce createRange(const EphemeralRange&)

Source/core/editing/EphemeralRange.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef EphemeralRange_h
 #define EphemeralRange_h
 
 #include "core/editing/Position.h"
 
 namespace blink {
@@ skipping 69 matching lines @@
     uint64_t m_domTreeVersion;
 #endif
 };
 
 extern template class CORE_EXTERN_TEMPLATE_EXPORT EphemeralRangeTemplate<EditingStrategy>;
 using EphemeralRange = EphemeralRangeTemplate<EditingStrategy>;
 
 extern template class CORE_EXTERN_TEMPLATE_EXPORT EphemeralRangeTemplate<EditingInComposedTreeStrategy>;
 using EphemeralRangeInComposedTree = EphemeralRangeTemplate<EditingInComposedTreeStrategy>;
 
+// Returns a newly created |Range| object from |range| or |nullptr| if
+// |range.isNull()| returns true.
+CORE_EXPORT PassRefPtrWillBeRawPtr<Range> createRange(const EphemeralRange& /* range */);
+
 } // namespace blink
 
 #endif