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diff --git a/src/3rdparty/webkit/WebCore/rendering/style/CollapsedBorderValue.h b/src/3rdparty/webkit/WebCore/rendering/style/CollapsedBorderValue.h
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--- /dev/null
+++ b/src/3rdparty/webkit/WebCore/rendering/style/CollapsedBorderValue.h
@@ -0,0 +1,66 @@
+/*
+ * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
+ *           (C) 2000 Antti Koivisto (koivisto@kde.org)
+ *           (C) 2000 Dirk Mueller (mueller@kde.org)
+ * Copyright (C) 2003, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
+ * Copyright (C) 2006 Graham Dennis (graham.dennis@gmail.com)
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public License
+ * along with this library; see the file COPYING.LIB.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ *
+ */
+
+#ifndef CollapsedBorderValue_h
+#define CollapsedBorderValue_h
+
+#include "BorderValue.h"
+
+namespace WebCore {
+
+struct CollapsedBorderValue {
+    CollapsedBorderValue()
+        : border(0)
+        , precedence(BOFF)
+    {
+    }
+
+    CollapsedBorderValue(const BorderValue* b, EBorderPrecedence p)
+        : border(b)
+        , precedence(p)
+    {
+    }
+
+    int width() const { return border && border->nonZero() ? border->width : 0; }
+    EBorderStyle style() const { return border ? border->style() : BHIDDEN; }
+    bool exists() const { return border; }
+    Color color() const { return border ? border->color : Color(); }
+    bool isTransparent() const { return border ? border->isTransparent() : true; }
+    
+    bool operator==(const CollapsedBorderValue& o) const
+    {
+        if (!border)
+            return !o.border;
+        if (!o.border)
+            return false;
+        return *border == *o.border && precedence == o.precedence;
+    }
+    
+    const BorderValue* border;
+    EBorderPrecedence precedence;    
+};
+
+} // namespace WebCore
+
+#endif // CollapsedBorderValue_h