Revert "Remove OwnPtr from Blink."

third_party/WebKit/Source/platform/fonts/OrientationIterator.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 OrientationIterator_h
 #define OrientationIterator_h
 
 #include "platform/fonts/FontOrientation.h"
 #include "platform/fonts/ScriptRunIterator.h"
 #include "platform/fonts/UTF16TextIterator.h"
 #include "wtf/Allocator.h"
 #include "wtf/Noncopyable.h"
-#include <memory>
 
 namespace blink {
 
 class PLATFORM_EXPORT OrientationIterator {
     USING_FAST_MALLOC(OrientationIterator);
     WTF_MAKE_NONCOPYABLE(OrientationIterator);
 public:
     enum RenderOrientation {
         OrientationKeep,
         OrientationRotateSideways,
         OrientationInvalid
     };
 
     OrientationIterator(const UChar* buffer, unsigned bufferSize, FontOrientation runOrientation);
 
     bool consume(unsigned* orientationLimit, RenderOrientation*);
 private:
-    std::unique_ptr<UTF16TextIterator> m_utf16Iterator;
+    OwnPtr<UTF16TextIterator> m_utf16Iterator;
     unsigned m_bufferSize;
     bool m_atEnd;
 };
 
 } // namespace blink
 
 #endif