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diff --git a/Source/WebCore/platform/SuddenTermination.h b/Source/WebCore/platform/SuddenTermination.h
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+/*
+ * Copyright (C) 2009 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.
+ */
+
+#ifndef SuddenTermination_h
+#define SuddenTermination_h
+
+namespace WebCore {
+
+    // Once disabled via one or more more calls to disableSuddenTermination(), fast shutdown
+    // is not valid until enableSuddenTermination() has been called an equal number of times.
+    // On Mac, these are thin wrappers around Mac OS X functions of the same name.
+    void disableSuddenTermination();
+    void enableSuddenTermination();
+
+#if (!PLATFORM(MAC) || defined(BUILDING_ON_TIGER) || defined(BUILDING_ON_LEOPARD)) && !PLATFORM(CHROMIUM)
+    inline void disableSuddenTermination() { }
+    inline void enableSuddenTermination() { }
+#endif
+
+} // namespace WebCore
+
+#endif // SuddenTermination_h