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diff --git a/sample/subtly/stats.h b/sample/subtly/stats.h
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+/*
+ * Copyright 2011 Google Inc. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef TYPOGRAPHY_FONT_SFNTLY_SRC_SAMPLE_SUBTLY_STATS_H_
+#define TYPOGRAPHY_FONT_SFNTLY_SRC_SAMPLE_SUBTLY_STATS_H_
+
+#include <stdio.h>
+
+#include "sfntly/port/type.h"
+
+namespace sfntly {
+class Font;
+}
+
+namespace subtly {
+using namespace sfntly;
+
+int32_t TotalFontSize(Font* font);
+
+double TableSizePercent(Font* font, int32_t tag);
+
+void PrintComparison(FILE* out, Font* font, Font* new_font);
+
+void PrintStats(FILE* out, Font* font);
+}
+
+#endif  // TYPOGRAPHY_FONT_SFNTLY_SRC_SAMPLE_SUBTLY_STATS_H_