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diff --git a/WebCore/bindings/v8/npruntime_priv.h b/WebCore/bindings/v8/npruntime_priv.h
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+/*
+ * Copyright (C) 2003, 2006 Apple Computer, 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 COMPUTER, 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 COMPUTER, 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 npruntime_priv_h
+#define npruntime_priv_h
+
+#include "third_party/npapi/bindings/npruntime.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*
+    _NPN_InitializeVariantWithStringCopy() will copy string data.  The string data
+    will be deallocated by calls to NPReleaseVariantValue().
+*/
+void _NPN_InitializeVariantWithStringCopy(NPVariant*, const NPString*);
+void _NPN_DeallocateObject(NPObject*);
+
+// The following routines allow the browser to aggressively cleanup NPObjects
+// on a per plugin basis.  All NPObjects used through the NPRuntime API should
+// be "registered" while they are alive.  After an object has been
+// deleted, it is possible for Javascript to have a reference to that object
+// which has not yet been garbage collected.  Javascript access to NPObjects
+// will reference this registry to determine if the object is accessible or
+// not.
+
+// Windows introduces an additional complication for objects created by the
+// plugin.  Plugins load inside of a DLL.  Each DLL has it's own heap.  If
+// the browser unloads the plugin DLL, all objects created within the DLL's
+// heap instantly become invalid.  Normally, when WebKit drops the reference
+// on the top-level plugin object, it tells the plugin manager that the
+// plugin can be destroyed, which can unload the DLL.  So, we must eliminate
+// all pointers to any object ever created by the plugin.
+
+// We generally associate NPObjects with an owner.  The owner of an NPObject
+// is an NPObject which, when destroyed, also destroys all objects it owns.
+// For example, if an NPAPI plugin creates 10 sub-NPObjects, all 11 objects
+// (the NPAPI plugin + its 10 sub-objects) should become inaccessible
+// simultaneously.
+
+// The ownership hierarchy is flat, and not a tree.  Imagine the following
+// object creation:
+//     PluginObject
+//          |
+//          +-- Creates -----> Object1
+//                                |
+//                                +-- Creates -----> Object2
+//
+// PluginObject will be the "owner" for both Object1 and Object2.
+
+// Register an NPObject with the runtime.  If the owner is NULL, the
+// object is treated as an owning object.  If owner is not NULL,
+// this object will be registered as owned by owner's top-level owner.
+void _NPN_RegisterObject(NPObject*, NPObject* owner);
+
+// Unregister an NPObject with the runtime.  If obj is an owning
+// object, this call will also unregister all of the owned objects.
+void _NPN_UnregisterObject(NPObject*);
+
+// Check to see if an object is registered with the runtime.
+// Return true if registered, false otherwise.
+bool _NPN_IsAlive(NPObject*);
+
+#ifdef __cplusplus
+}  /* end extern "C" */
+#endif
+
+#endif // npruntime_priv_h