Revert "Remove OwnPtr from Blink."

third_party/WebKit/Source/wtf/PassOwnPtr.h

 /*
- * Copyright (C) 2008 Apple Inc. All Rights Reserved.
+ * Copyright (C) 2009, 2010 Apple Inc. All rights reserved.
+ * Copyright (C) 2013 Intel Corporation. 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
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 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 KURLHash_h
-#define KURLHash_h
+#ifndef WTF_PassOwnPtr_h
+#define WTF_PassOwnPtr_h
 
-#include "platform/weborigin/KURL.h"
 #include "wtf/Allocator.h"
-#include "wtf/text/StringHash.h"
-#include "wtf/text/WTFString.h"
-
-namespace blink {
-
-// KURLHash doesn't support null KURLs.  get(), contains(), and add() on
-// HashMap<KURL,..., KURLHash> cause a null-pointer dereference when passed null
-// KURLs.
-
-struct KURLHash {
-    STATIC_ONLY(KURLHash);
-    static unsigned hash(const KURL& key)
-    {
-        return key.getString().impl()->hash();
-    }
-
-    static bool equal(const KURL& a, const KURL& b)
-    {
-        return StringHash::equal(a.getString(), b.getString());
-    }
-
-    static const bool safeToCompareToEmptyOrDeleted = false;
-};
-
-} // namespace blink
+#include "wtf/Forward.h"
+#include "wtf/Noncopyable.h"
+#include "wtf/OwnPtr.h"
 
 namespace WTF {
 
-template<> struct HashTraits<blink::KURL> : SimpleClassHashTraits<blink::KURL> { };
+// PassOwnPtr is now an alias of OwnPtr, as defined in Forward.h.
+
+template <typename T> PassOwnPtr<T> adoptPtr(T*);
+template <typename T> PassOwnPtr<T[]> adoptArrayPtr(T*);
+
+template <typename T> inline PassOwnPtr<T> adoptPtr(T* ptr)
+{
+    return PassOwnPtr<T>(ptr);
+}
+
+template <typename T> inline PassOwnPtr<T[]> adoptArrayPtr(T* ptr)
+{
+    return PassOwnPtr<T[]>(ptr);
+}
+
+template <typename T, typename U> inline PassOwnPtr<T> static_pointer_cast(PassOwnPtr<U>&& p)
+{
+    static_assert(!std::is_array<T>::value, "pointers to array must never be converted");
+    return adoptPtr(static_cast<T*>(p.leakPtr()));
+}
 
 } // namespace WTF
 
-#endif // KURLHash_h
+using WTF::adoptPtr;
+using WTF::adoptArrayPtr;
+using WTF::static_pointer_cast;
+
+#endif // WTF_PassOwnPtr_h