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diff --git a/src/libs/xpcom18a4/xpcom/ds/nsValueArray.h b/src/libs/xpcom18a4/xpcom/ds/nsValueArray.h
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+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+ *
+ * ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is nsValueArray.h/nsValueArray.cpp code, released
+ * Dec 28, 2001.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 2001
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Garrett Arch Blythe, 20-December-2001
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either of the GNU General Public License Version 2 or later (the "GPL"),
+ * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+#ifndef nsValueArray_h___
+#define nsValueArray_h___
+
+//
+// nsValueArray.h
+//
+// Implement an array class to store unsigned integer values.
+// The maximum value must be known up front.  Once known, the
+//  smallest memory representation will be attempted; i.e. if the
+//  maximum value was 1275, then 2 bytes (uint16) would represent each value
+//  in the array instead of 4 bytes (uint32).
+//
+#include "nscore.h"
+
+typedef PRUint32 nsValueArrayCount;
+typedef PRUint32 nsValueArrayIndex;
+typedef PRUint32 nsValueArrayValue;
+#define NSVALUEARRAY_INVALID ((nsValueArrayValue)-1)
+
+class NS_COM nsValueArray {
+  public:
+    nsValueArray(nsValueArrayValue aMaxValue,
+                 nsValueArrayCount aInitialCapacity = 0);
+    ~nsValueArray();
+
+    //
+    // Assignment.
+    //
+  public:
+    nsValueArray& operator=(const nsValueArray& other);
+
+    //
+    // Array size information.
+    // Ability to add more values without growing is Capacity - Count.
+    //
+  public:
+    inline nsValueArrayCount Count() const {
+        return mCount;
+    }
+
+    inline nsValueArrayCount Capacity() const {
+        return mCapacity;
+    }
+
+    void Compact();
+
+    // Removes all elements from this array
+    inline void Clear() {
+        mCount = 0;
+    }
+
+    //
+    // Array access.
+    //
+  public:
+    nsValueArrayValue ValueAt(nsValueArrayIndex aIndex) const;
+
+    inline nsValueArrayValue operator[](nsValueArrayIndex aIndex) const {
+        return ValueAt(aIndex);
+    }
+
+    nsValueArrayIndex IndexOf(nsValueArrayValue aPossibleValue) const;
+
+    inline PRBool AppendValue(nsValueArrayValue aValue) {
+        return InsertValueAt(aValue, Count());
+    }
+
+    inline PRBool RemoveValue(nsValueArrayValue aValue) {
+        return  RemoveValueAt(IndexOf(aValue));
+    }
+
+    PRBool InsertValueAt(nsValueArrayValue aValue, nsValueArrayIndex aIndex);
+
+    PRBool RemoveValueAt(nsValueArrayIndex aIndex);
+
+    //
+    // Data members.
+    //
+  private:
+    nsValueArrayCount mCount;
+    nsValueArrayCount mCapacity;
+    PRUint8* mValueArray;
+    PRUint8 mBytesPerValue;
+};
+
+#endif /* nsValueArray_h___ */