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diff --git a/WebCore/platform/graphics/mac/SimpleFontDataATSUI.mm b/WebCore/platform/graphics/mac/SimpleFontDataATSUI.mm
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+/*
+ * Copyright (C) 2005, 2006 Apple Computer, Inc.  All rights reserved.
+ * Copyright (C) 2006 Alexey Proskuryakov
+ *
+ * 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. 
+ * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
+ *     its contributors may be used to endorse or promote products derived
+ *     from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE 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 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.
+ */
+
+#import "config.h"
+#import "SimpleFontData.h"
+
+#if USE(ATSUI)
+
+#import "Font.h"
+#import "FontCache.h"
+#import "FontDescription.h"
+#import <ApplicationServices/ApplicationServices.h>
+#import <AppKit/AppKit.h>
+#import <wtf/Assertions.h>
+
+using namespace std;
+
+namespace WebCore {
+
+void SimpleFontData::checkShapesArabic() const
+{
+    ASSERT(!m_checkedShapesArabic);
+
+    m_checkedShapesArabic = true;
+    
+    ATSUFontID fontID = m_platformData.m_atsuFontID;
+    if (!fontID) {
+        LOG_ERROR("unable to get ATSUFontID for %@", m_platformData.font());
+        return;
+    }
+
+    // This function is called only on fonts that contain Arabic glyphs. Our
+    // heuristic is that if such a font has a glyph metamorphosis table, then
+    // it includes shaping information for Arabic.
+    FourCharCode tables[] = { 'morx', 'mort' };
+    for (unsigned i = 0; i < sizeof(tables) / sizeof(tables[0]); ++i) {
+        ByteCount tableSize;
+        OSStatus status = ATSFontGetTable(fontID, tables[i], 0, 0, 0, &tableSize);
+        if (status == noErr) {
+            m_shapesArabic = true;
+            return;
+        }
+
+        if (status != kATSInvalidFontTableAccess)
+            LOG_ERROR("ATSFontGetTable failed (%d)", status);
+    }
+}
+
+} // namespace WebCore
+
+#endif