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diff --git a/modules/woff2/src/woff2_dec.h b/modules/woff2/src/woff2_dec.h
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+++ b/modules/woff2/src/woff2_dec.h
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+// Copyright 2014 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.
+//
+// Library for converting WOFF2 format font files to their TTF versions.
+
+#ifndef WOFF2_WOFF2_DEC_H_
+#define WOFF2_WOFF2_DEC_H_
+
+#include <stddef.h>
+#include <inttypes.h>
+#include "./woff2_out.h"
+
+namespace woff2 {
+
+// Compute the size of the final uncompressed font, or 0 on error.
+size_t ComputeWOFF2FinalSize(const uint8_t *data, size_t length);
+
+// Decompresses the font into the target buffer. The result_length should
+// be the same as determined by ComputeFinalSize(). Returns true on successful
+// decompression.
+// DEPRECATED; please prefer the version that takes a WOFF2Out*
+bool ConvertWOFF2ToTTF(uint8_t *result, size_t result_length,
+                       const uint8_t *data, size_t length);
+
+// Decompresses the font into out. Returns true on success.
+// Works even if WOFF2Header totalSfntSize is wrong.
+// Please prefer this API.
+bool ConvertWOFF2ToTTF(const uint8_t *data, size_t length,
+                       WOFF2Out* out);
+
+} // namespace woff2
+
+#endif  // WOFF2_WOFF2_DEC_H_