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diff --git a/Source/WebCore/page/SecurityOriginHash.h b/Source/WebCore/page/SecurityOriginHash.h
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+++ b/Source/WebCore/page/SecurityOriginHash.h
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+/*
+ * 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
+ *     notice, this list of conditions and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution.
+ * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
+ *     its contributors may be used to endorse or promote products derived
+ *     from this software without specific prior written permission.
+ *
+ * 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 SecurityOriginHash_h
+#define SecurityOriginHash_h
+
+#include "KURL.h"
+#include "SecurityOrigin.h"
+#include <wtf/RefPtr.h>
+
+namespace WebCore {
+
+struct SecurityOriginHash {
+    static unsigned hash(SecurityOrigin* origin)
+    {
+        unsigned hashCodes[3] = {
+            origin->protocol().impl() ? origin->protocol().impl()->hash() : 0,
+            origin->host().impl() ? origin->host().impl()->hash() : 0,
+            origin->port()
+        };
+        return WTF::StringHasher::createBlobHash<sizeof(hashCodes)>(hashCodes);
+    }
+    static unsigned hash(const RefPtr<SecurityOrigin>& origin)
+    {
+        return hash(origin.get());
+    }
+
+    static bool equal(SecurityOrigin* a, SecurityOrigin* b)
+    {
+        // FIXME: The hash function above compares three specific fields.
+        // This code to compare those three specific fields should be moved here from
+        // SecurityOrigin as mentioned in SecurityOrigin.h so we don't accidentally change
+        // equal without changing hash to match it.
+        if (!a || !b)
+            return a == b;
+        return a->equal(b);
+    }
+    static bool equal(SecurityOrigin* a, const RefPtr<SecurityOrigin>& b)
+    {
+        return equal(a, b.get());
+    }
+    static bool equal(const RefPtr<SecurityOrigin>& a, SecurityOrigin* b)
+    {
+        return equal(a.get(), b);
+    }
+    static bool equal(const RefPtr<SecurityOrigin>& a, const RefPtr<SecurityOrigin>& b)
+    {
+        return equal(a.get(), b.get());
+    }
+
+    static const bool safeToCompareToEmptyOrDeleted = false;
+};
+
+} // namespace WebCore
+
+#endif