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diff --git a/Source/WTF/wtf/OSObjectPtr.h b/Source/WTF/wtf/OSObjectPtr.h
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+++ b/Source/WTF/wtf/OSObjectPtr.h
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+/*
+ * Copyright (C) 2014 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
+ *    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. AND ITS CONTRIBUTORS ``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 ITS 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 OSObjectPtr_h
+#define OSObjectPtr_h
+
+#include <os/object.h>
+#include <wtf/Assertions.h>
+#include <wtf/StdLibExtras.h>
+
+namespace WTF {
+
+template<typename T> class OSObjectPtr;
+template<typename T> OSObjectPtr<T> adoptOSObject(T);
+
+template<typename T>
+static inline void retainOSObject(T ptr)
+{
+    os_retain(ptr);
+}
+
+template<typename T>
+static inline void releaseOSObject(T ptr)
+{
+    os_release(ptr);
+}
+
+template<typename T> class OSObjectPtr {
+public:
+    OSObjectPtr()
+        : m_ptr(nullptr)
+    {
+    }
+
+    ~OSObjectPtr()
+    {
+        if (m_ptr)
+            releaseOSObject(m_ptr);
+    }
+
+    T get() const { return m_ptr; }
+
+    explicit operator bool() const { return m_ptr; }
+    bool operator!() const { return !m_ptr; }
+
+    OSObjectPtr(const OSObjectPtr& other)
+        : m_ptr(other.m_ptr)
+    {
+        if (m_ptr)
+            retainOSObject(m_ptr);
+    }
+
+    OSObjectPtr(OSObjectPtr&& other)
+        : m_ptr(other.m_ptr)
+    {
+        other.m_ptr = nullptr;
+    }
+
+    OSObjectPtr& operator=(const OSObjectPtr& other)
+    {
+        OSObjectPtr ptr = other;
+        swap(ptr);
+        return *this;
+    }
+
+    OSObjectPtr& operator=(OSObjectPtr&& other)
+    {
+        OSObjectPtr ptr = WTFMove(other);
+        swap(ptr);
+        return *this;
+    }
+
+    OSObjectPtr& operator=(std::nullptr_t)
+    {
+        if (m_ptr)
+            releaseOSObject(m_ptr);
+        m_ptr = nullptr;
+
+        return *this;
+    }
+
+    void swap(OSObjectPtr& other)
+    {
+        std::swap(m_ptr, other.m_ptr);
+    }
+
+    T leakRef() WARN_UNUSED_RETURN
+    {
+        return std::exchange(m_ptr, nullptr);
+    }
+
+    friend OSObjectPtr adoptOSObject<T>(T);
+
+private:
+    struct AdoptOSObject { };
+    OSObjectPtr(AdoptOSObject, T ptr)
+        : m_ptr(ptr)
+    {
+    }
+
+    T m_ptr;
+};
+
+template<typename T> inline OSObjectPtr<T> adoptOSObject(T ptr)
+{
+    return OSObjectPtr<T>(typename OSObjectPtr<T>::AdoptOSObject { }, ptr);
+}
+
+} // namespace WTF
+
+using WTF::OSObjectPtr;
+using WTF::adoptOSObject;
+
+#endif // OSObjectPtr_h