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diff --git a/modules/brotli/enc/compress_fragment_two_pass.h b/modules/brotli/enc/compress_fragment_two_pass.h
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+++ b/modules/brotli/enc/compress_fragment_two_pass.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 two-pass processing: in the first pass we save
+   the found backward matches and literal bytes into a buffer, and in the
+   second pass we emit them into the bit stream using prefix codes built based
+   on the actual command and literal byte histograms. */
+
+#ifndef BROTLI_ENC_COMPRESS_FRAGMENT_TWO_PASS_H_
+#define BROTLI_ENC_COMPRESS_FRAGMENT_TWO_PASS_H_
+
+#include "../common/platform.h"
+#include <brotli/types.h>
+#include "./memory.h"
+
+#if defined(__cplusplus) || defined(c_plusplus)
+extern "C" {
+#endif
+
+static const size_t kCompressFragmentTwoPassBlockSize = 1 << 17;
+
+/* 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.
+
+   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: "command_buf" and "literal_buf" point to at least
+              kCompressFragmentTwoPassBlockSize long arrays.
+   REQUIRES: All elements in "table[0..table_size-1]" are initialized to zero.
+   REQUIRES: "table_size" is a power of two
+   OUTPUT: maximal copy distance <= |input_size|
+   OUTPUT: maximal copy distance <= BROTLI_MAX_BACKWARD_LIMIT(18) */
+BROTLI_INTERNAL void BrotliCompressFragmentTwoPass(MemoryManager* m,
+                                                   const uint8_t* input,
+                                                   size_t input_size,
+                                                   BROTLI_BOOL is_last,
+                                                   uint32_t* command_buf,
+                                                   uint8_t* literal_buf,
+                                                   int* table,
+                                                   size_t table_size,
+                                                   size_t* storage_ix,
+                                                   uint8_t* storage);
+
+#if defined(__cplusplus) || defined(c_plusplus)
+}  /* extern "C" */
+#endif
+
+#endif  /* BROTLI_ENC_COMPRESS_FRAGMENT_TWO_PASS_H_ */