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diff --git a/modules/brotli/enc/compress_fragment.h b/modules/brotli/enc/compress_fragment.h
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+++ b/modules/brotli/enc/compress_fragment.h
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+/* Copyright 2015 Google Inc. All Rights Reserved.
+
+   Distributed under MIT license.
+   See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
+*/
+
+/* Function for fast encoding of an input fragment, independently from the input
+   history. This function uses one-pass processing: when we find a backward
+   match, we immediately emit the corresponding command and literal codes to
+   the bit stream. */
+
+#ifndef BROTLI_ENC_COMPRESS_FRAGMENT_H_
+#define BROTLI_ENC_COMPRESS_FRAGMENT_H_
+
+#include "../common/platform.h"
+#include <brotli/types.h>
+#include "./memory.h"
+
+#if defined(__cplusplus) || defined(c_plusplus)
+extern "C" {
+#endif
+
+/* Compresses "input" string to the "*storage" buffer as one or more complete
+   meta-blocks, and updates the "*storage_ix" bit position.
+
+   If "is_last" is 1, emits an additional empty last meta-block.
+
+   "cmd_depth" and "cmd_bits" contain the command and distance prefix codes
+   (see comment in encode.h) used for the encoding of this input fragment.
+   If "is_last" is 0, they are updated to reflect the statistics
+   of this input fragment, to be used for the encoding of the next fragment.
+
+   "*cmd_code_numbits" is the number of bits of the compressed representation
+   of the command and distance prefix codes, and "cmd_code" is an array of
+   at least "(*cmd_code_numbits + 7) >> 3" size that contains the compressed
+   command and distance prefix codes. If "is_last" is 0, these are also
+   updated to represent the updated "cmd_depth" and "cmd_bits".
+
+   REQUIRES: "input_size" is greater than zero, or "is_last" is 1.
+   REQUIRES: "input_size" is less or equal to maximal metablock size (1 << 24).
+   REQUIRES: All elements in "table[0..table_size-1]" are initialized to zero.
+   REQUIRES: "table_size" is an odd (9, 11, 13, 15) power of two
+   OUTPUT: maximal copy distance <= |input_size|
+   OUTPUT: maximal copy distance <= BROTLI_MAX_BACKWARD_LIMIT(18) */
+BROTLI_INTERNAL void BrotliCompressFragmentFast(MemoryManager* m,
+                                                const uint8_t* input,
+                                                size_t input_size,
+                                                BROTLI_BOOL is_last,
+                                                int* table, size_t table_size,
+                                                uint8_t cmd_depth[128],
+                                                uint16_t cmd_bits[128],
+                                                size_t* cmd_code_numbits,
+                                                uint8_t* cmd_code,
+                                                size_t* storage_ix,
+                                                uint8_t* storage);
+
+#if defined(__cplusplus) || defined(c_plusplus)
+}  /* extern "C" */
+#endif
+
+#endif  /* BROTLI_ENC_COMPRESS_FRAGMENT_H_ */