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diff --git a/WebKit/chromium/public/WebPrivateOwnPtr.h b/WebKit/chromium/public/WebPrivateOwnPtr.h
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+++ b/WebKit/chromium/public/WebPrivateOwnPtr.h
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+/*
+ * Copyright (C) 2010 Google 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 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 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 WebPrivateOwnPtr_h
+#define WebPrivateOwnPtr_h
+
+#include "WebCommon.h"
+
+namespace WebKit {
+
+// This class is an implementation detail of the WebKit API.  It exists
+// to help simplify the implementation of WebKit interfaces that merely
+// wrap a pointer to a WebCore class. It's similar to WebPrivatePtr, but it
+// wraps a naked pointer rather than a reference counted.
+// Note: you must call reset(0) on the implementation side in order to delete
+// the WebCore pointer.
+template <typename T>
+class WebPrivateOwnPtr {
+public:
+    WebPrivateOwnPtr() : m_ptr(0) {}
+    ~WebPrivateOwnPtr() { WEBKIT_ASSERT(!m_ptr); }
+
+#if WEBKIT_IMPLEMENTATION
+    explicit WebPrivateOwnPtr(T* ptr)
+        : m_ptr(ptr)
+    {
+    }
+
+    void reset(T* ptr)
+    {
+        delete m_ptr;
+        m_ptr = ptr;
+    }
+
+    T* get() const { return m_ptr; }
+
+    T* operator->() const
+    {
+        WEBKIT_ASSERT(m_ptr);
+        return m_ptr;
+    }
+#endif // WEBKIT_IMPLEMENTATION
+
+private:
+    T* m_ptr;
+
+    WebPrivateOwnPtr(const WebPrivateOwnPtr&);
+    void operator=(const WebPrivateOwnPtr&);
+};
+
+} // namespace WebKit
+
+#endif