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diff --git a/Tools/TestWebKitAPI/Tests/WTF/NakedPtr.cpp b/Tools/TestWebKitAPI/Tests/WTF/NakedPtr.cpp
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+++ b/Tools/TestWebKitAPI/Tests/WTF/NakedPtr.cpp
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+/*
+ * Copyright (C) 2015 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. ``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.
+ */
+
+#include "config.h"
+
+#include "RefLogger.h"
+#include <wtf/NakedPtr.h>
+
+namespace TestWebKitAPI {
+
+// For these tests, we need a base class and a derived class. For this purpose,
+// we reuse the RefLogger and DerivedRefLogger classes.
+
+TEST(WTF_NakedPtr, Basic)
+{
+    DerivedRefLogger a("a");
+
+    NakedPtr<RefLogger> empty;
+    ASSERT_EQ(nullptr, empty.get());
+
+    {
+        NakedPtr<RefLogger> ptr(&a);
+        ASSERT_EQ(&a, ptr.get());
+        ASSERT_EQ(&a, &*ptr);
+        ASSERT_EQ(&a.name, &ptr->name);
+    }
+
+    {
+        NakedPtr<RefLogger> ptr = &a;
+        ASSERT_EQ(&a, ptr.get());
+    }
+
+    {
+        NakedPtr<RefLogger> p1 = &a;
+        NakedPtr<RefLogger> p2(p1);
+        ASSERT_EQ(&a, p1.get());
+        ASSERT_EQ(&a, p2.get());
+    }
+
+    {
+        NakedPtr<RefLogger> p1 = &a;
+        NakedPtr<RefLogger> p2 = p1;
+        ASSERT_EQ(&a, p1.get());
+        ASSERT_EQ(&a, p2.get());
+    }
+
+    {
+        NakedPtr<RefLogger> p1 = &a;
+        NakedPtr<RefLogger> p2 = WTF::move(p1);
+        ASSERT_EQ(&a, p1.get());
+        ASSERT_EQ(&a, p2.get());
+    }
+
+    {
+        NakedPtr<RefLogger> p1 = &a;
+        NakedPtr<RefLogger> p2(WTF::move(p1));
+        ASSERT_EQ(&a, p1.get());
+        ASSERT_EQ(&a, p2.get());
+    }
+
+    {
+        NakedPtr<DerivedRefLogger> p1 = &a;
+        NakedPtr<RefLogger> p2 = p1;
+        ASSERT_EQ(&a, p1.get());
+        ASSERT_EQ(&a, p2.get());
+    }
+
+    {
+        NakedPtr<DerivedRefLogger> p1 = &a;
+        NakedPtr<RefLogger> p2 = WTF::move(p1);
+        ASSERT_EQ(&a, p1.get());
+        ASSERT_EQ(&a, p2.get());
+    }
+
+    {
+        NakedPtr<RefLogger> ptr(&a);
+        ASSERT_EQ(&a, ptr.get());
+        ptr.clear();
+        ASSERT_EQ(nullptr, ptr.get());
+    }
+}
+
+TEST(WTF_NakedPtr, Assignment)
+{
+    DerivedRefLogger a("a");
+    RefLogger b("b");
+    DerivedRefLogger c("c");
+
+    {
+        NakedPtr<RefLogger> p1(&a);
+        NakedPtr<RefLogger> p2(&b);
+        ASSERT_EQ(&a, p1.get());
+        ASSERT_EQ(&b, p2.get());
+        p1 = p2;
+        ASSERT_EQ(&b, p1.get());
+        ASSERT_EQ(&b, p2.get());
+    }
+
+    {
+        NakedPtr<RefLogger> ptr(&a);
+        ASSERT_EQ(&a, ptr.get());
+        ptr = &b;
+        ASSERT_EQ(&b, ptr.get());
+    }
+
+    {
+        NakedPtr<RefLogger> ptr(&a);
+        ASSERT_EQ(&a, ptr.get());
+        ptr = nullptr;
+        ASSERT_EQ(nullptr, ptr.get());
+    }
+
+    {
+        NakedPtr<RefLogger> p1(&a);
+        NakedPtr<RefLogger> p2(&b);
+        ASSERT_EQ(&a, p1.get());
+        ASSERT_EQ(&b, p2.get());
+        p1 = WTF::move(p2);
+        ASSERT_EQ(&b, p1.get());
+        ASSERT_EQ(&b, p2.get());
+    }
+
+    {
+        NakedPtr<RefLogger> p1(&a);
+        NakedPtr<DerivedRefLogger> p2(&c);
+        ASSERT_EQ(&a, p1.get());
+        ASSERT_EQ(&c, p2.get());
+        p1 = p2;
+        ASSERT_EQ(&c, p1.get());
+        ASSERT_EQ(&c, p2.get());
+    }
+
+    {
+        NakedPtr<RefLogger> ptr(&a);
+        ASSERT_EQ(&a, ptr.get());
+        ptr = &c;
+        ASSERT_EQ(&c, ptr.get());
+    }
+
+    {
+        NakedPtr<RefLogger> p1(&a);
+        NakedPtr<DerivedRefLogger> p2(&c);
+        ASSERT_EQ(&a, p1.get());
+        ASSERT_EQ(&c, p2.get());
+        p1 = WTF::move(p2);
+        ASSERT_EQ(&c, p1.get());
+        ASSERT_EQ(&c, p2.get());
+    }
+
+    {
+        NakedPtr<RefLogger> ptr(&a);
+        ASSERT_EQ(&a, ptr.get());
+        ptr = ptr;
+        ASSERT_EQ(&a, ptr.get());
+    }
+
+    {
+        NakedPtr<RefLogger> ptr(&a);
+        ASSERT_EQ(&a, ptr.get());
+        ptr = WTF::move(ptr);
+        ASSERT_EQ(&a, ptr.get());
+    }
+}
+
+TEST(WTF_NakedPtr, Swap)
+{
+    RefLogger a("a");
+    RefLogger b("b");
+
+    {
+        NakedPtr<RefLogger> p1(&a);
+        NakedPtr<RefLogger> p2(&b);
+        ASSERT_EQ(&a, p1.get());
+        ASSERT_EQ(&b, p2.get());
+        p1.swap(p2);
+        ASSERT_EQ(&b, p1.get());
+        ASSERT_EQ(&a, p2.get());
+    }
+
+    {
+        NakedPtr<RefLogger> p1(&a);
+        NakedPtr<RefLogger> p2(&b);
+        ASSERT_EQ(&a, p1.get());
+        ASSERT_EQ(&b, p2.get());
+        std::swap(p1, p2);
+        ASSERT_EQ(&b, p1.get());
+        ASSERT_EQ(&a, p2.get());
+    }
+}
+
+NakedPtr<RefLogger> nakedPtrFoo(RefLogger& logger)
+{
+    return NakedPtr<RefLogger>(&logger);
+}
+
+TEST(WTF_NakedPtr, ReturnValue)
+{
+    DerivedRefLogger a("a");
+
+    {
+        auto ptr = nakedPtrFoo(a);
+        ASSERT_EQ(&a, ptr.get());
+        ASSERT_EQ(&a, &*ptr);
+        ASSERT_EQ(&a.name, &ptr->name);
+    }
+}
+
+} // namespace TestWebKitAPI