[web] Support woff2 fonts (#55908)

- Enable support for WOFF2 fonts.
- Add Brotli depndency (increases CK size by ~53KB compressed, including the Brotli dictionary).
- Use split WOFF2 fonts for Emoji.
- Remove the `useColorEmoji` runtime config flag.

Partially based off of #41282
Fixes flutter/flutter#119536
Contributes to flutter/flutter#153974 and opens the door for moving more fonts to WOFF2.

Author: mdebbar

DEPS

@@ -158,6 +158,7 @@ vars = {
   "upstream_boolean_selector": "https://github.com/dart-lang/boolean_selector.git",
   "upstream_boringssl_gen": "https://github.com/dart-lang/boringssl_gen.git",
   "upstream_boringssl": "https://github.com/openssl/openssl.git",
+  "upstream_brotli": "https://github.com/google/brotli.git",
   "upstream_browser_launcher": "https://github.com/dart-lang/browser_launcher.git",
   "upstream_buildroot": "https://github.com/flutter/buildroot.git",
   "upstream_cli_util": "https://github.com/dart-lang/cli_util.git",
@@ -320,6 +321,9 @@ deps = {
   'src/flutter/third_party/boringssl':
    Var('dart_git') + '/boringssl_gen.git' + '@' + Var('dart_boringssl_gen_rev'),
 
+  'src/flutter/third_party/brotli':
+   Var('skia_git') + '/external/github.com/google/brotli.git' + '@' + '350100a5bb9d9671aca85213b2ec7a70a361b0cd',
+
   'src/flutter/third_party/yapf':
   Var('flutter_git') + '/third_party/yapf' + '@' + '212c5b5ad8e172d2d914ae454c121c89cccbcb35',
 
@@ -1006,7 +1010,7 @@ deps = {
       'packages': [
         {
           'package': 'flutter/flutter_font_fallbacks',
-          'version': 'c81f5a2b369b48df3728d2b247a27901bb76bbce0c40b343fe1cc924a36b36ea'
+          'version': '91f2de34d4a309816a182ce7552201d95388e2e0bceea951a6dd04693ed6fe30'
         }
       ],
       'dep_type': 'cipd',

build/secondary/third_party/brotli/BUILD.gn

@@ -0,0 +1,39 @@
+# Copyright 2013 The Flutter 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_root = "//flutter/third_party/brotli"
+
+config("brotli_public") {
+  include_dirs = [
+    "$source_root/c/include",
+    "$source_root/c/common/dictionary.h",
+  ]
+
+  cflags = []
+  foreach(dir, include_dirs) {
+    cflags += [
+      "-isystem",
+      rebase_path(dir),
+    ]
+  }
+}
+
+static_library("brotli") {
+  # Brotli is used by freetype; it only needs the brotli decoder.
+  sources = [
+    "$source_root/c/common/constants.c",
+    "$source_root/c/common/context.c",
+    "$source_root/c/common/dictionary.c",
+    "$source_root/c/common/platform.c",
+    "$source_root/c/common/shared_dictionary.c",
+    "$source_root/c/common/transform.c",
+    "$source_root/c/dec/bit_reader.c",
+    "$source_root/c/dec/decode.c",
+    "$source_root/c/dec/huffman.c",
+    "$source_root/c/dec/state.c",
+  ]
+
+  public_configs = [ ":brotli_public" ]
+  cflags = [ "-w" ]
+}

ci/licenses.sh

@@ -173,7 +173,7 @@ function verify_licenses() (
 
   local actualLicenseCount
   actualLicenseCount="$(tail -n 1 flutter/ci/licenses_golden/licenses_flutter | tr -dc '0-9')"
-  local expectedLicenseCount=909 # When changing this number: Update the error message below as well describing the newly expected license types.
+  local expectedLicenseCount=918
 
   if [[ $actualLicenseCount -ne $expectedLicenseCount ]]; then
     echo "=============================== ERROR ==============================="

ci/licenses_golden/excluded_files

@@ -1346,6 +1346,33 @@
 ../../../flutter/third_party/boringssl/src/third_party/wycheproof_testvectors/xchacha20_poly1305_test.json
 ../../../flutter/third_party/boringssl/src/third_party/wycheproof_testvectors/xchacha20_poly1305_test.txt
 ../../../flutter/third_party/boringssl/src/util
+../../../flutter/third_party/brotli/.editorconfig
+../../../flutter/third_party/brotli/.git
+../../../flutter/third_party/brotli/.gitattributes
+../../../flutter/third_party/brotli/.github
+../../../flutter/third_party/brotli/.gitignore
+../../../flutter/third_party/brotli/BUILD.bazel
+../../../flutter/third_party/brotli/CHANGELOG.md
+../../../flutter/third_party/brotli/CMakeLists.txt
+../../../flutter/third_party/brotli/CONTRIBUTING.md
+../../../flutter/third_party/brotli/MANIFEST.in
+../../../flutter/third_party/brotli/README
+../../../flutter/third_party/brotli/README.md
+../../../flutter/third_party/brotli/SECURITY.md
+../../../flutter/third_party/brotli/WORKSPACE.bazel
+../../../flutter/third_party/brotli/c/fuzz/.bazelrc
+../../../flutter/third_party/brotli/c/fuzz/BUILD.bazel
+../../../flutter/third_party/brotli/c/fuzz/WORKSPACE.bazel
+../../../flutter/third_party/brotli/csharp
+../../../flutter/third_party/brotli/docs
+../../../flutter/third_party/brotli/go
+../../../flutter/third_party/brotli/java
+../../../flutter/third_party/brotli/js
+../../../flutter/third_party/brotli/python
+../../../flutter/third_party/brotli/research
+../../../flutter/third_party/brotli/scripts
+../../../flutter/third_party/brotli/setup.py
+../../../flutter/third_party/brotli/tests
 ../../../flutter/third_party/cpu_features/src/.clang-format
 ../../../flutter/third_party/cpu_features/src/.git
 ../../../flutter/third_party/cpu_features/src/.github