Revert "Remove OwnPtr from Blink."

third_party/WebKit/Source/wtf/text/Collator.h

 /*
  * Copyright (C) 2008 Apple Inc. All rights reserved.
  *
  * 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 13 matching lines @@
  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef WTF_Collator_h
 #define WTF_Collator_h
 
 #include "wtf/Allocator.h"
 #include "wtf/Noncopyable.h"
+#include "wtf/PassOwnPtr.h"
 #include "wtf/WTFExport.h"
 #include "wtf/text/Unicode.h"
-#include <memory>
 
 struct UCollator;
 
 namespace WTF {
 
 class WTF_EXPORT Collator {
     WTF_MAKE_NONCOPYABLE(Collator);
     USING_FAST_MALLOC(Collator);
 public:
     enum Result { Equal = 0, Greater = 1, Less = -1 };
 
     // From ICU's uloc.h (ULOC_FULLNAME_CAPACITY)
     static const size_t ulocFullnameCapacity = 157;
 
     Collator(const char* locale); // Parsing is lenient; e.g. language identifiers (such as "en-US") are accepted, too.
     ~Collator();
     void setOrderLowerFirst(bool);
 
-    static std::unique_ptr<Collator> userDefault();
+    static PassOwnPtr<Collator> userDefault();
 
     Result collate(const ::UChar*, size_t, const ::UChar*, size_t) const;
 
 private:
     void createCollator() const;
     void releaseCollator();
     void setEquivalentLocale(const char*, char*);
     mutable UCollator* m_collator;
 
     char* m_locale;
     char m_equivalentLocale[ulocFullnameCapacity];
     bool m_lowerFirst;
 };
 
 } // namespace WTF
 
 using WTF::Collator;
 
 #endif