Update from https://crrev.com/318214

third_party/brotli/dec/huffman.h

+/* Copyright 2013 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.
+
+   Utilities for building Huffman decoding tables.
+*/
+
+#ifndef BROTLI_DEC_HUFFMAN_H_
+#define BROTLI_DEC_HUFFMAN_H_
+
+#include <assert.h>
+#include "./types.h"
+
+#if defined(__cplusplus) || defined(c_plusplus)
+extern "C" {
+#endif
+
+typedef struct {
+  uint8_t bits;     /* number of bits used for this symbol */
+  uint16_t value;   /* symbol value or table offset */
+} HuffmanCode;
+
+/* Builds Huffman lookup table assuming code lengths are in symbol order. */
+/* Returns false in case of error (invalid tree or memory error). */
+int BrotliBuildHuffmanTable(HuffmanCode* root_table,
+                            int root_bits,
+                            const uint8_t* const code_lengths,
+                            int code_lengths_size);
+
+#if defined(__cplusplus) || defined(c_plusplus)
+}    /* extern "C" */
+#endif
+
+#endif  /* BROTLI_DEC_HUFFMAN_H_ */