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diff --git a/WebCore/css/Media.cpp b/WebCore/css/Media.cpp
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--- /dev/null
+++ b/WebCore/css/Media.cpp
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+/*
+ * Copyright (C) 2009 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 COMPUTER, 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 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 "Media.h"
+#include "CSSStyleSelector.h"
+#include "Frame.h"
+#include "FrameView.h"
+#include "MediaList.h"
+#include "MediaQueryEvaluator.h"
+
+namespace WebCore {
+
+Media::Media(DOMWindow* window)
+    : m_window(window)
+{
+}
+
+String Media::type() const
+{
+    Frame* frame = m_window->frame();
+    FrameView* view = frame ? frame->view() : 0;
+    if (view)
+        return view->mediaType();
+
+    return String();
+}
+
+bool Media::matchMedium(const String& query) const
+{
+    Document* document = m_window->document();
+    Frame* frame = m_window->frame();
+
+    CSSStyleSelector* styleSelector = document->styleSelector();
+    Element* docElement = document->documentElement();
+    if (!styleSelector || !docElement || !frame)
+        return false;
+
+    RefPtr<RenderStyle> rootStyle = styleSelector->styleForElement(docElement, 0 /*defaultParent*/, false /*allowSharing*/, true /*resolveForRootDefault*/);
+    RefPtr<MediaList> media = MediaList::create();
+
+    ExceptionCode ec = 0;
+    media->setMediaText(query, ec);
+    if (ec)
+        return false;
+
+    MediaQueryEvaluator screenEval(type(), frame, rootStyle.get());
+    return screenEval.eval(media.get());
+}
+
+} // namespace WebCore