Update brotli to v1.0.0-snapshot.

third_party/brotli/enc/utf8_util.h

 /* Copyright 2013 Google Inc. All Rights Reserved.
 
    Distributed under MIT license.
    See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
 */
 
-// Heuristics for deciding about the UTF8-ness of strings.
+/* Heuristics for deciding about the UTF8-ness of strings. */
 
 #ifndef BROTLI_ENC_UTF8_UTIL_H_
 #define BROTLI_ENC_UTF8_UTIL_H_
 
-#include "./types.h"
+#include <brotli/types.h>
+#include "./port.h"
 
-namespace brotli {
+#if defined(__cplusplus) || defined(c_plusplus)
+extern "C" {
+#endif
 
 static const double kMinUTF8Ratio = 0.75;
 
-// Returns true if at least min_fraction of the bytes between pos and
-// pos + length in the (data, mask) ringbuffer is UTF8-encoded.
-bool IsMostlyUTF8(const uint8_t* data, const size_t pos, const size_t mask,
-                  const size_t length, const double min_fraction);
+/* Returns 1 if at least min_fraction of the bytes between pos and
+   pos + length in the (data, mask) ring-buffer is UTF8-encoded, otherwise
+   returns 0. */
+BROTLI_INTERNAL BROTLI_BOOL BrotliIsMostlyUTF8(
+    const uint8_t* data, const size_t pos, const size_t mask,
+    const size_t length, const double min_fraction);
 
-}  // namespace brotli
+#if defined(__cplusplus) || defined(c_plusplus)
+}  /* extern "C" */
+#endif
 
-#endif  // BROTLI_ENC_UTF8_UTIL_H_
+#endif  /* BROTLI_ENC_UTF8_UTIL_H_ */