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diff --git a/Source/WebCore/css/MediaQueryExp.cpp b/Source/WebCore/css/MediaQueryExp.cpp
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+/*
+ * CSS Media Query
+ *
+ * Copyright (C) 2006 Kimmo Kinnunen <kimmo.t.kinnunen@nokia.com>.
+ * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+ *
+ * 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 THE AUTHOR ``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 COMPUTER, 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. 
+ */
+
+#include "config.h"
+#include "MediaQueryExp.h"
+
+#include "CSSParser.h"
+#include "CSSPrimitiveValue.h"
+#include "CSSValueList.h"
+#include <wtf/text/StringBuilder.h>
+
+namespace WebCore {
+
+inline MediaQueryExp::MediaQueryExp(const AtomicString& mediaFeature, CSSParserValueList* valueList)
+    : m_mediaFeature(mediaFeature)
+    , m_value(0)
+    , m_isValid(true)
+{
+    if (valueList) {
+        if (valueList->size() == 1) {
+            CSSParserValue* value = valueList->current();
+
+            if (value->id != 0)
+                m_value = CSSPrimitiveValue::createIdentifier(value->id);
+            else if (value->unit == CSSPrimitiveValue::CSS_STRING)
+                m_value = CSSPrimitiveValue::create(value->string, (CSSPrimitiveValue::UnitTypes) value->unit);
+            else if (value->unit >= CSSPrimitiveValue::CSS_NUMBER &&
+                      value->unit <= CSSPrimitiveValue::CSS_KHZ)
+                m_value = CSSPrimitiveValue::create(value->fValue, (CSSPrimitiveValue::UnitTypes) value->unit);
+
+            valueList->next();
+        } else if (valueList->size() > 1) {
+            // create list of values
+            // currently accepts only <integer>/<integer>
+
+            RefPtr<CSSValueList> list = CSSValueList::createCommaSeparated();
+            CSSParserValue* value = 0;
+            bool isValid = true;
+
+            while ((value = valueList->current()) && isValid) {
+                if (value->unit == CSSParserValue::Operator && value->iValue == '/')
+                    list->append(CSSPrimitiveValue::create("/", CSSPrimitiveValue::CSS_STRING));
+                else if (value->unit == CSSPrimitiveValue::CSS_NUMBER)
+                    list->append(CSSPrimitiveValue::create(value->fValue, CSSPrimitiveValue::CSS_NUMBER));
+                else
+                    isValid = false;
+
+                value = valueList->next();
+            }
+
+            if (isValid)
+                m_value = list.release();
+        }
+        m_isValid = m_value;
+    }
+}
+
+
+PassOwnPtr<MediaQueryExp> MediaQueryExp::create(const AtomicString& mediaFeature, CSSParserValueList* values)
+{
+    return adoptPtr(new MediaQueryExp(mediaFeature, values));
+}
+
+MediaQueryExp::~MediaQueryExp()
+{
+}
+
+String MediaQueryExp::serialize() const
+{
+    if (!m_serializationCache.isNull())
+        return m_serializationCache;
+
+    StringBuilder result;
+    result.append("(");
+    result.append(m_mediaFeature.lower());
+    if (m_value) {
+        result.append(": ");
+        result.append(m_value->cssText());
+    }
+    result.append(")");
+
+    const_cast<MediaQueryExp*>(this)->m_serializationCache = result.toString();
+    return m_serializationCache;
+}
+
+} // namespace