Update from https://crrev.com/318214

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.
 
 source_set("brotli") {
   sources = [
-    "src/brotli/dec/bit_reader.c",
-    "src/brotli/dec/bit_reader.h",
-    "src/brotli/dec/context.h",
-    "src/brotli/dec/decode.c",
-    "src/brotli/dec/decode.h",
-    "src/brotli/dec/dictionary.h",
-    "src/brotli/dec/huffman.c",
-    "src/brotli/dec/huffman.h",
-    "src/brotli/dec/prefix.h",
-    "src/brotli/dec/safe_malloc.c",
-    "src/brotli/dec/safe_malloc.h",
-    "src/brotli/dec/streams.c",
-    "src/brotli/dec/streams.h",
-    "src/brotli/dec/transform.h",
-    "src/brotli/dec/types.h",
+    "dec/bit_reader.c",
+    "dec/bit_reader.h",
+    "dec/context.h",
+    "dec/decode.c",
+    "dec/decode.h",
+    "dec/dictionary.h",
+    "dec/huffman.c",
+    "dec/huffman.h",
+    "dec/prefix.h",
+    "dec/safe_malloc.c",
+    "dec/safe_malloc.h",
+    "dec/streams.c",
+    "dec/streams.h",
+    "dec/transform.h",
+    "dec/types.h",
   ]
 
   configs -= [ "//build/config/compiler:chromium_code" ]
   configs += [ "//build/config/compiler:no_chromium_code" ]
 
-  include_dirs = [ "src/brotli/dec" ]
+  include_dirs = [ "dec" ]
 }
-
-source_set("woff2_dec") {
-  sources = [
-    "src/woff2/buffer.h",
-    "src/woff2/round.h",
-    "src/woff2/store_bytes.h",
-    "src/woff2/table_tags.cc",
-    "src/woff2/table_tags.h",
-    "src/woff2/woff2_common.h",
-    "src/woff2/woff2_dec.cc",
-    "src/woff2/woff2_dec.h",
-  ]
-
-  configs -= [ "//build/config/compiler:chromium_code" ]
-  configs += [ "//build/config/compiler:no_chromium_code" ]
-
-  deps = [
-    ":brotli",
-  ]
-
-  include_dirs = [
-    "src/brotli/dec",
-    "src/woff2",
-  ]
-}