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diff --git a/chromium/third_party/WebKit/Source/core/css/CSSCustomFontData.h b/chromium/third_party/WebKit/Source/core/css/CSSCustomFontData.h
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+++ b/chromium/third_party/WebKit/Source/core/css/CSSCustomFontData.h
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+/*
+ * Copyright (C) 2013 Google, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public License
+ * along with this library; see the file COPYING.LIB.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ *
+ */
+
+#ifndef CSSCustomFontData_h
+#define CSSCustomFontData_h
+
+#include "core/css/CSSFontFaceSource.h"
+#include "platform/fonts/CustomFontData.h"
+
+namespace WebCore {
+
+class CSSCustomFontData FINAL : public CustomFontData {
+public:
+    static PassRefPtr<CSSCustomFontData> create(bool isLoadingFallback = false)
+    {
+        return adoptRef(new CSSCustomFontData(isLoadingFallback));
+    }
+
+    virtual ~CSSCustomFontData() { }
+
+    virtual void beginLoadIfNeeded() const OVERRIDE
+    {
+        if (!m_isUsed && m_isLoadingFallback && m_fontFaceSource) {
+            m_isUsed = true;
+            m_fontFaceSource->beginLoadIfNeeded();
+        }
+    }
+
+    virtual void setCSSFontFaceSource(CSSFontFaceSource* source) OVERRIDE { m_fontFaceSource = source; }
+    virtual void clearCSSFontFaceSource() OVERRIDE { m_fontFaceSource = 0; }
+
+private:
+    CSSCustomFontData(bool isLoadingFallback)
+        : CustomFontData(isLoadingFallback)
+        , m_fontFaceSource(0)
+    {
+    }
+
+    CSSFontFaceSource* m_fontFaceSource;
+};
+
+}
+
+#endif // CSSCustomFontData_h