Update brotli to v1.0.0-snapshot.

third_party/brotli/enc/bit_cost.c

Index: third_party/brotli/enc/bit_cost.c
diff --git a/third_party/brotli/enc/bit_cost.c b/third_party/brotli/enc/bit_cost.c
new file mode 100644
index 0000000000000000000000000000000000000000..01e30f6d5fff0e439e2b27e30c262f7afcffcf05
--- /dev/null
+++ b/third_party/brotli/enc/bit_cost.c
@@ -0,0 +1,35 @@
+/* Copyright 2013 Google Inc. All Rights Reserved.
+
+   Distributed under MIT license.
+   See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
+*/
+
+/* Functions to estimate the bit cost of Huffman trees. */
+
+#include "./bit_cost.h"
+
+#include "../common/constants.h"
+#include <brotli/types.h>
+#include "./fast_log.h"
+#include "./histogram.h"
+#include "./port.h"
+
+#if defined(__cplusplus) || defined(c_plusplus)
+extern "C" {
+#endif
+
+#define FN(X) X ## Literal
+#include "./bit_cost_inc.h"  /* NOLINT(build/include) */
+#undef FN
+
+#define FN(X) X ## Command
+#include "./bit_cost_inc.h"  /* NOLINT(build/include) */
+#undef FN
+
+#define FN(X) X ## Distance
+#include "./bit_cost_inc.h"  /* NOLINT(build/include) */
+#undef FN
+
+#if defined(__cplusplus) || defined(c_plusplus)
+}  /* extern "C" */
+#endif