Introduce createRange(const EphemeralRange&)

Source/core/editing/EphemeralRange.cpp

Index: Source/core/editing/EphemeralRange.cpp
diff --git a/Source/core/editing/EphemeralRange.cpp b/Source/core/editing/EphemeralRange.cpp
index 3e1d87b21cc3aecf526bcaa274c165215e73ba35..05253b23128bc0387893767dd98513c75c2c9b39 100644
--- a/Source/core/editing/EphemeralRange.cpp
+++ b/Source/core/editing/EphemeralRange.cpp
@@ -144,6 +144,13 @@ bool EphemeralRangeTemplate<Strategy>::isValid() const
 }
 #endif
 
+PassRefPtrWillBeRawPtr<Range> createRange(const EphemeralRange& range)
+{
+    if (range.isNull())
+        return nullptr;
+    return Range::create(range.document(), range.startPosition(), range.endPosition());
+}
+
 template class CORE_TEMPLATE_EXPORT EphemeralRangeTemplate<EditingStrategy>;
 template class CORE_TEMPLATE_EXPORT EphemeralRangeTemplate<EditingInComposedTreeStrategy>;