Introduce createRange(const EphemeralRange&)

Source/core/editing/InputMethodController.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2011 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 336 matching lines @@
     unsigned length = m_compositionNode->length();
     unsigned start = std::min(m_compositionStart, length);
     unsigned end = std::min(std::max(start, m_compositionEnd), length);
     if (start >= end)
         return EphemeralRange();
     return EphemeralRange(Position(m_compositionNode.get(), start), Position(m_compositionNode.get(), end));
 }
 
 PassRefPtrWillBeRawPtr<Range> InputMethodController::compositionRange() const
 {
-    const EphemeralRange range = compositionEphemeralRange();
-    if (range.isNull())
-        return nullptr;
-    return Range::create(range.document(), range.startPosition(), range.endPosition());
+    return createRange(compositionEphemeralRange());
 }
 
 PlainTextRange InputMethodController::getSelectionOffsets() const
 {
     RefPtrWillBeRawPtr<Range> range = frame().selection().selection().firstRange();
     if (!range)
         return PlainTextRange();
     ContainerNode* editable = frame().selection().rootEditableElementOrTreeScopeRootNode();
     ASSERT(editable);
     return PlainTextRange::create(*editable, *range.get());
@@ skipping 51 matching lines @@
     TypingCommand::deleteSelection(*frame().document());
 }
 
 DEFINE_TRACE(InputMethodController)
 {
     visitor->trace(m_frame);
     visitor->trace(m_compositionNode);
 }
 
 } // namespace blink