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diff --git a/WebCore/platform/graphics/GlyphWidthMap.h b/WebCore/platform/graphics/GlyphWidthMap.h
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+++ b/WebCore/platform/graphics/GlyphWidthMap.h
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+/*
+ * Copyright (C) 2006 Apple Computer, 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. 
+ * 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.
+ */
+
+#ifndef GlyphWidthMap_h
+#define GlyphWidthMap_h
+
+#include <wtf/unicode/Unicode.h>
+#include <wtf/Noncopyable.h>
+#include <wtf/HashMap.h>
+
+namespace WebCore {
+
+typedef unsigned short Glyph;
+
+const float cGlyphWidthUnknown = -1;
+
+class GlyphWidthMap : Noncopyable {
+public:
+    GlyphWidthMap() : m_filledPrimaryPage(false), m_pages(0) {}
+    ~GlyphWidthMap() { if (m_pages) { deleteAllValues(*m_pages); delete m_pages; } }
+
+    float widthForGlyph(Glyph);
+    void setWidthForGlyph(Glyph, float);
+
+private:
+    struct GlyphWidthPage {
+        static const size_t size = 256; // Usually covers Latin-1 in a single page.
+        float m_widths[size];
+
+        float widthForGlyph(Glyph g) const { return m_widths[g % size]; }
+        void setWidthForGlyph(Glyph g, float w)
+        {
+            setWidthForIndex(g % size, w);
+        }
+        void setWidthForIndex(unsigned index, float w)
+        {
+            m_widths[index] = w;
+        }
+    };
+    
+    GlyphWidthPage* locatePage(unsigned page);
+    
+    bool m_filledPrimaryPage;
+    GlyphWidthPage m_primaryPage; // We optimize for the page that contains glyph indices 0-255.
+    HashMap<int, GlyphWidthPage*>* m_pages;
+};
+
+}
+#endif