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diff --git a/Source/WebCore/css/DeprecatedCSSOMPrimitiveValue.h b/Source/WebCore/css/DeprecatedCSSOMPrimitiveValue.h
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+++ b/Source/WebCore/css/DeprecatedCSSOMPrimitiveValue.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. ``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.
+ */
+
+#pragma once
+
+#include "CSSPrimitiveValue.h"
+#include "DeprecatedCSSOMValue.h"
+
+namespace WebCore {
+
+class DeprecatedCSSOMCounter;
+class DeprecatedCSSOMRGBColor;
+class DeprecatedCSSOMRect;
+    
+class DeprecatedCSSOMPrimitiveValue : public DeprecatedCSSOMValue {
+public:
+    // Only expose what's in the IDL file.
+    enum UnitType {
+        CSS_UNKNOWN = 0,
+        CSS_NUMBER = 1,
+        CSS_PERCENTAGE = 2,
+        CSS_EMS = 3,
+        CSS_EXS = 4,
+        CSS_PX = 5,
+        CSS_CM = 6,
+        CSS_MM = 7,
+        CSS_IN = 8,
+        CSS_PT = 9,
+        CSS_PC = 10,
+        CSS_DEG = 11,
+        CSS_RAD = 12,
+        CSS_GRAD = 13,
+        CSS_MS = 14,
+        CSS_S = 15,
+        CSS_HZ = 16,
+        CSS_KHZ = 17,
+        CSS_DIMENSION = 18,
+        CSS_STRING = 19,
+        CSS_URI = 20,
+        CSS_IDENT = 21,
+        CSS_ATTR = 22,
+        CSS_COUNTER = 23,
+        CSS_RECT = 24,
+        CSS_RGBCOLOR = 25,
+        CSS_VW = 26,
+        CSS_VH = 27,
+        CSS_VMIN = 28,
+        CSS_VMAX = 29
+    };
+
+    static Ref<DeprecatedCSSOMPrimitiveValue> create(const CSSPrimitiveValue& value)
+    {
+        return adoptRef(*new DeprecatedCSSOMPrimitiveValue(value));
+    }
+
+    bool equals(const DeprecatedCSSOMPrimitiveValue& other) const { return m_value->equals(other.m_value); }
+    unsigned cssValueType() const { return m_value->cssValueType(); }
+    String cssText() const { return m_value->cssText(); }
+    
+    // FIXME: Eventually these will contain more code and not just call through to
+    // CSSPrimitiveValue.
+    WEBCORE_EXPORT unsigned short primitiveType() const;
+    WEBCORE_EXPORT ExceptionOr<void> setFloatValue(unsigned short unitType, double);
+    WEBCORE_EXPORT ExceptionOr<float> getFloatValue(unsigned short unitType) const;
+    WEBCORE_EXPORT ExceptionOr<void> setStringValue(unsigned short stringType, const String&);
+    WEBCORE_EXPORT ExceptionOr<String> getStringValue() const;
+    WEBCORE_EXPORT ExceptionOr<Ref<DeprecatedCSSOMCounter>> getCounterValue() const;
+    WEBCORE_EXPORT ExceptionOr<Ref<DeprecatedCSSOMRect>> getRectValue() const;
+    WEBCORE_EXPORT ExceptionOr<Ref<DeprecatedCSSOMRGBColor>> getRGBColorValue() const;
+
+    String stringValue() const { return m_value->stringValue(); }
+
+protected:
+    DeprecatedCSSOMPrimitiveValue(const CSSPrimitiveValue& value)
+        : DeprecatedCSSOMValue(DeprecatedPrimitiveValueClass)
+        , m_value(const_cast<CSSPrimitiveValue&>(value))
+    {
+    }
+
+private:
+    Ref<CSSPrimitiveValue> m_value;
+};
+    
+} // namespace WebCore
+
+SPECIALIZE_TYPE_TRAITS_CSSOM_VALUE(DeprecatedCSSOMPrimitiveValue, isPrimitiveValue())