Update brotli to v1.0.0-snapshot.

third_party/brotli/BUILD.gn

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 if (is_win) {
   import("//build/config/win/visual_studio_version.gni")
 }
 
-static_library("brotli") {
+config("includes") {
+  include_dirs = [ "include" ]
+}
+
+static_library("common") {
+  sources = [
+    "common/constants.h",
+    "common/dictionary.c",
+    "common/dictionary.h",
+    "common/version.h",
+  ]
+  public_configs = [ ":includes" ]
+}
+
+static_library("dec") {
   sources = [
     "dec/bit_reader.c",
     "dec/bit_reader.h",
     "dec/context.h",
     "dec/decode.c",
-    "dec/decode.h",
-    "dec/dictionary.c",
-    "dec/dictionary.h",
     "dec/huffman.c",
     "dec/huffman.h",
     "dec/port.h",
     "dec/prefix.h",
     "dec/state.c",
     "dec/state.h",
     "dec/transform.h",
-    "dec/types.h",
+  ]
+  public_configs = [ ":includes" ]
+
+  deps = [
+    ":common",
   ]
 
   configs -= [ "//build/config/compiler:chromium_code" ]
   configs += [ "//build/config/compiler:no_chromium_code" ]
 
   # Since we are never debug brotli, freeze the optimizations to -O2.
   configs -= [ "//build/config/compiler:default_optimization" ]
   configs += [ "//build/config/compiler:optimize_max" ]
-
-  include_dirs = [ "dec" ]
 }
 
 if (current_toolchain == host_toolchain) {
   executable("bro") {
     sources = [
-      "enc/backward_references.cc",
+      "common/constants.h",
+      "enc/backward_references.c",
       "enc/backward_references.h",
+      "enc/backward_references_inc.h",
+      "enc/bit_cost.c",
       "enc/bit_cost.h",
-      "enc/block_splitter.cc",
+      "enc/bit_cost_inc.h",
+      "enc/block_encoder_inc.h",
+      "enc/block_splitter.c",
       "enc/block_splitter.h",
-      "enc/brotli_bit_stream.cc",
+      "enc/block_splitter_inc.h",
+      "enc/brotli_bit_stream.c",
       "enc/brotli_bit_stream.h",
+      "enc/cluster.c",
       "enc/cluster.h",
+      "enc/cluster_inc.h",
       "enc/command.h",
-      "enc/compress_fragment.cc",
+      "enc/compress_fragment.c",
       "enc/compress_fragment.h",
-      "enc/compress_fragment_two_pass.cc",
+      "enc/compress_fragment_two_pass.c",
       "enc/compress_fragment_two_pass.h",
-      "enc/compressor.h",
       "enc/context.h",
       "enc/dictionary_hash.h",
-      "enc/encode.cc",
-      "enc/encode.h",
-      "enc/encode_parallel.cc",
-      "enc/encode_parallel.h",
-      "enc/entropy_encode.cc",
+      "enc/encode.c",
+      "enc/entropy_encode.c",
       "enc/entropy_encode.h",
       "enc/entropy_encode_static.h",
       "enc/fast_log.h",
       "enc/find_match_length.h",
-      "enc/hash.h ",
-      "enc/histogram.cc",
+      "enc/hash.h",
+      "enc/hash_forgetful_chain_inc.h",
+      "enc/hash_longest_match_inc.h",
+      "enc/hash_longest_match_quickly_inc.h",
+      "enc/histogram.c",
       "enc/histogram.h",
-      "enc/literal_cost.cc",
+      "enc/histogram_inc.h",
+      "enc/literal_cost.c",
       "enc/literal_cost.h",
-      "enc/metablock.cc",
+      "enc/memory.c",
+      "enc/memory.h",
+      "enc/metablock.c",
       "enc/metablock.h",
-      "enc/port.h ",
+      "enc/metablock_inc.h",
+      "enc/port.h",
       "enc/prefix.h",
+      "enc/quality.h",
       "enc/ringbuffer.h",
-      "enc/static_dict.cc",
+      "enc/static_dict.c",
       "enc/static_dict.h",
       "enc/static_dict_lut.h",
-      "enc/streams.cc",
-      "enc/streams.h",
-      "enc/transform.h",
-      "enc/types.h",
-      "enc/utf8_util.cc",
+      "enc/utf8_util.c",
       "enc/utf8_util.h",
       "enc/write_bits.h",
-      "tools/bro.cc",
+      "tools/bro.c",
     ]
+    public_configs = [ ":includes" ]
+
     deps = [
-      ":brotli",
+      ":common",
+      ":dec",
       "//build/config/sanitizers:deps",
       "//build/win:default_exe_manifest",
     ]
 
     if (is_win && visual_studio_version == "2015") {
       # Disabling "result of 32-bit shift implicitly converted to 64 bits",
       # caused by code like: foo |= (1 << i);   // warning 4334
       cflags = [ "/wd4334" ]
     }
 
     # Always build release since this is a build tool.
     if (is_debug) {
       configs -= [ "//build/config:debug" ]
       configs += [ "//build/config:release" ]
     }
   }
 }