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diff --git a/Source/WebCore/platform/LengthPoint.h b/Source/WebCore/platform/LengthPoint.h
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+++ b/Source/WebCore/platform/LengthPoint.h
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+/*
+ * Copyright (C) 2016 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. 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 INC. 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 LengthPoint_h
+#define LengthPoint_h
+
+#include "Length.h"
+
+namespace WebCore {
+
+struct LengthPoint {
+public:
+    LengthPoint()
+    {
+    }
+    
+    LengthPoint(Length x, Length y)
+        : m_x(WTFMove(x))
+        , m_y(WTFMove(y))
+    {
+    }
+
+    bool operator==(const LengthPoint& o) const
+    {
+        return m_x == o.m_x && m_y == o.m_y;
+    }
+
+    bool operator!=(const LengthPoint& o) const
+    {
+        return !(*this == o);
+    }
+
+    void setX(Length x) { m_x = WTFMove(x); }
+    const Length& x() const { return m_x; }
+
+    void setY(Length y) { m_y = WTFMove(y); }
+    const Length& y() const { return m_y; }
+
+    LengthPoint blend(const LengthPoint& from, double progress) const
+    {
+        return LengthPoint(m_x.blend(from.x(), progress), m_y.blend(from.y(), progress));
+    }
+
+private:
+    // FIXME: it would be nice to pack the two Lengths together better somehow (to avoid padding between them).
+    Length m_x;
+    Length m_y;
+};
+
+TextStream& operator<<(TextStream&, const LengthPoint&);
+
+} // namespace WebCore
+
+#endif // LengthPoint_h