目的

前回はChromium全体について Line of Code (LOC) を用いて規模を確認した
今回は Chromium 内部をもう少し探っていく

結論

Chromium のレンダリングエンジン blink は third_party ディレクトリに存在
Chromium のJavaScriptエンジン v8 は Chromium のリポジトリとは別に管理
Chromium は利用する多数のライブラリを専用に抱える。そのライブラリ群は Chromium のリポジトリとは別リポジトリで管理
Blink, v8 それぞれの規模は下記の通り

Component	LOC(C/C++/Assembly/Java)
blink	1,760,045
v8	1,483,480

chromium/src のディレクトリ毎のLOC

src 以下のファイルとディレクトリについてLOCを測る

$ cd ~/work/chromium/
$ time for d in src/*; \
do ~/work/cloc-1.88/cloc --quiet --csv --timeout=60 $d | \
   tail +3 | sed "s@^@$d,@"; \
done |  \
sed  1i"dir, files, language, blank, comment, code"  > ../cloc_chromium_src.csv

real	6m2.908s
user	5m46.510s
sys	0m16.376s

$ cat ../cloc_chromium_src.csv | head 
dir, files, language, blank, comment, code
src/android_webview,416,Java,11695,11418,64403
src/android_webview,175,C++,5058,2653,24321
src/android_webview,156,C/C++ Header,2299,1709,6700
src/android_webview,53,Markdown,1108,0,3808
src/android_webview,221,XML,151,289,3508
src/android_webview,16,Python,660,776,2402
src/android_webview,41,HTML,38,4,720
src/android_webview,1,JSON,0,0,271
src/android_webview,3,JavaScript,30,21,166

dir	LOC
src/third_party	10,670,497
src/chrome	5,350,427
src/components	2,370,634
src/content	1,141,190
src/ui	1,046,091
src/net	714,807
src/tools	667,950
src/ios	538,292
src/ash	509,143
src/media	439,579
src/chromeos	379,771
src/base	356,995
src/testing	351,565
src/gpu	312,811
src/extensions	278,730
src/services	269,956
src/cc	222,584
src/native_client_sdk	208,934
src/ppapi	162,051
src/remoting	161,515
src/device	157,469
src/chromecast	116,089
src/android_webview	106,476
src/mojo	94,043
src/sandbox	64,292
src/build	61,501
src/storage	56,590
src/docs	56,024
src/weblayer	55,395
src/google_apis	35,610
src/fuchsia	25,295
src/pdf	21,943
src/headless	17,238
src/ipc	15,733
src/printing	14,912
src/url	13,108
src/courgette	12,228
src/sql	9,704
src/dbus	9,599
src/skia	8,445
src/jingle	6,981
src/crypto	5,925
src/rlz	5,529
src/gin	5,478
src/PRESUBMIT.py	4,090
src/styleguide	3,463
src/PRESUBMIT_test.py	3,156
src/apps	2,423
src/cloud_print	1,963
src/buildtools	1,501
src/infra	1,413
src/google_update	1,138
src/codelabs	480
src/PRESUBMIT_test_mocks.py	162
src/CODE_OF_CONDUCT.md	68
src/build_overrides	23
src/README.md	13

C, C++, Assembly, Java で確認

テスト用のHTMLやJavaScript等が多く含まれるため、今回も C, C++, Assembly, Java に絞って確認する
third_party, chrome が約350万LOCと以前巨大な規模ではあることが確認できる

dir	LOC
src/third_party	3,544,748
src/chrome	3,478,179
src/components	1,658,843
src/content	901,105
src/ui	697,196
src/net	532,119
src/media	422,926
src/ash	412,267
src/base	343,026
src/chromeos	314,487
src/gpu	293,099
src/services	258,855
src/extensions	236,711
src/cc	221,712
src/device	142,905
src/ppapi	136,546
src/remoting	127,667
src/chromecast	108,793
src/android_webview	95,424
src/native_client_sdk	83,531
src/mojo	73,801
src/ios	72,722
src/sandbox	61,725
src/storage	56,191
src/weblayer	52,430
src/tools	48,036
src/google_apis	33,970
src/fuchsia	24,214
src/pdf	21,926
src/ipc	15,665
src/printing	14,107
src/url	13,014
src/headless	12,060
src/courgette	11,623
src/sql	9,630
src/dbus	9,593
src/testing	7,266
src/jingle	6,981
src/skia	6,930
src/crypto	5,738
src/gin	5,461
src/rlz	5,257
src/apps	2,423
src/build	1,747
src/cloud_print	1,619
src/codelabs	241
src/buildtools	59

third_party 内を確認する

$ time for d in src/third_party/*; \
do ~/work/cloc-1.88/cloc --quiet --csv --timeout=60 $d | \
   tail +3 | sed "s@^@$d,@"; \
done | \
sed  1i"dir, files, language, blank, comment, code"  > ../cloc_chromium_src_third_party.csv ; 

real	3m49.084s
user	3m34.197s
sys	0m15.386s
raiko@raikovm:~/work/chromium$ cat ../cloc_chromium_src_third_party.csv | head
dir, files, language, blank, comment, code
src/third_party/abseil-cpp,333,C++,15358,15320,93190
src/third_party/abseil-cpp,264,C/C++ Header,8936,27011,38682
src/third_party/abseil-cpp,7,Windows Module Definition,0,0,12565
src/third_party/abseil-cpp,27,CMake,439,563,6025
src/third_party/abseil-cpp,22,Bazel,451,355,5672
src/third_party/abseil-cpp,8,Pascal,334,1923,722
src/third_party/abseil-cpp,2,SQL,0,0,657
src/third_party/abseil-cpp,14,Bourne Shell,126,292,632
src/third_party/abseil-cpp,6,Python,144,161,552

Chromiumのレンダリングエンジンである blink が 176万LOC と半分近くを締めている

dir	LOC
src/third_party/blink	1,760,045
src/third_party/protobuf	340,312
src/third_party/boringssl	227,051
src/third_party/libxml	153,944
src/third_party/abseil-cpp	131,872
src/third_party/crashpad	100,740
src/third_party/win_build_output	94,840
src/third_party/hunspell	72,325
src/third_party/libwebp	62,410
src/third_party/opus	54,366
src/third_party/tcmalloc	52,179
src/third_party/libaom	44,609
src/third_party/libvpx	39,354
src/third_party/wtl	39,242
src/third_party/libxslt	31,300
src/third_party/brotli	31,247
src/third_party/libpng	28,171
src/third_party/unrar	23,636
src/third_party/khronos	23,420
src/third_party/zlib	20,982
src/third_party/mesa_headers	15,729
src/third_party/webdriver	15,010
src/third_party/libusb	13,822
src/third_party/ots	12,164
src/third_party/fontconfig	10,973
src/third_party/lzma_sdk	10,362
src/third_party/android_crazy_linker	10,197
src/third_party/wds	9,895
src/third_party/shell-encryption	9,511
src/third_party/afl	8,446
src/third_party/weston	7,631
src/third_party/libjingle_xmpp	7,532
src/third_party/inspector_protocol	6,650
src/third_party/wayland	6,074
src/third_party/qcms	5,607
src/third_party/pffft	4,697
src/third_party/sqlite	4,166
src/third_party/fft2d	3,697
src/third_party/woff2	3,664
src/third_party/zxcvbn-cpp	3,589
src/third_party/ijar	3,523
src/third_party/libXNVCtrl	2,739
src/third_party/libaddressinput	2,718
src/third_party/leveldatabase	2,560
src/third_party/decklink	2,396
src/third_party/s2cellid	2,335
src/third_party/simplejson	2,318
src/third_party/private_membership	2,132
src/third_party/gvr-android-sdk	1,992
src/third_party/android_data_chart	1,628
src/third_party/liburlpattern	1,395
src/third_party/private-join-and-compute	1,323
src/third_party/libbrlapi	1,260
src/third_party/android_swipe_refresh	1,199
src/third_party/x11proto	1,150
src/third_party/android_deps	1,109
src/third_party/opencv	1,035
src/third_party/libsecret	1,010
src/third_party/google_trust_services	903
src/third_party/gif_player	807
src/third_party/modp_b64	640
src/third_party/webrtc_overrides	582
src/third_party/android_opengl	577
src/third_party/pycoverage	530
src/third_party/ocmock	503
src/third_party/rnnoise	481
src/third_party/one_euro_filter	346
src/third_party/microsoft_webauthn	314
src/third_party/android_media	271
src/third_party/libx11	260
src/third_party/grpc	243
src/third_party/bspatch	237
src/third_party/libudev	225
src/third_party/googletest	223
src/third_party/sudden_motion_sensor	207
src/third_party/ashmem	207
src/third_party/ukey2	203
src/third_party/libva_protected_content	196
src/third_party/markupsafe	178
src/third_party/speech-dispatcher	176
src/third_party/dav1d	172
src/third_party/minizip	159
src/third_party/apple_apsl	154
src/third_party/freetype	149
src/third_party/iccjpeg	147
src/third_party/robolectric	144
src/third_party/harfbuzz-ng	139
src/third_party/liblouis	122
src/third_party/breakpad	107
src/third_party/android_provider	100
src/third_party/gvr-android-keyboard	97
src/third_party/libprotobuf-mutator	83
src/third_party/snappy	66
src/third_party/lcov	61
src/third_party/jsoncpp	61
src/third_party/expat	56
src/third_party/mozilla	44
src/third_party/ced	33
src/third_party/v4l-utils	32
src/third_party/libxcb-keysyms	31
src/third_party/libsync	24
src/third_party/widevine	15
src/third_party/libphonenumber	7
src/third_party/r8	6
src/third_party/crc32c	0

JavaScriptエンジン v8 はどこだ？

レンダリングエンジンの blink が176万LOCならば、JavaScriptエンジンの v8 はどの程度の規模なのか？
これまでの調査結果には v8 の名前がでてきていない。

v8 は Chromium とは別プロジェクト、別リポジトリで開発されているため、Chromiumのリポジトリには含まれていないのだ

v8のリポジトリとハッシュ値は src 直下のDEPSファイルで確認できる

$ cd ~/work/chromium/src/
$ git show 89.0.4388.4:DEPS | grep v8
  'v8_revision': '8b42c4e7175e5d28c57d72dade99c52a144bec1f',
              'version': 'y8fIfH8Leo2cPm7iGCYnBxZpwOlgLv8rm2mlcmJlvGsC',
  'src/v8':
    Var('chromium_git') + '/v8/v8.git' + '@' +  Var('v8_revision'),
  'v8',
                '--bucket', 'v8-wasm-fuzzer',
                '-s', 'src/v8/test/fuzzer/wasm_corpus.tar.gz.sha1',

$ git show 89.0.4388.4:DEPS | grep chromium_git | grep https
  'chromium_git': 'https://chromium.googlesource.com',

上記から Chromium 89.0.4388.4 が利用している v8 リポジトリとリビジョンがわかる
v8のリポジトリをクローンしてLOCを調査する

$ cd ~/work/
$ git clone https://chromium.googlesource.com/v8/v8.git
Cloning into 'v8'...
remote: Sending approximately 751.83 MiB ...
remote: Counting objects: 7660, done
remote: Total 811720 (delta 655777), reused 811720 (delta 655777)
Receiving objects: 100% (811720/811720), 751.83 MiB | 17.33 MiB/s, done.
Resolving deltas: 100% (655777/655777), done.
Checking out files: 100% (12719/12719), done.

$ cd v8/
raiko@raikovm:~/work/v8$ ls
AUTHORS              COMMON_OWNERS  ENG_REVIEW_OWNERS  INTL_OWNERS         MIPS_OWNERS   S390_OWNERS  third_party
BUILD.gn             custom_deps    gni                LICENSE             OWNERS        samples      tools
build_overrides      DEPS           include            LICENSE.fdlibm      PPC_OWNERS    src          WATCHLISTS
CODE_OF_CONDUCT.md   DIR_METADATA   infra              LICENSE.strongtalk  PRESUBMIT.py  test
codereview.settings  docs           INFRA_OWNERS       LICENSE.v8          README.md     testing

$ git checkout 8b42c4e7175e5d28c57d72dade99c52a144bec1f
Checking out files: 100% (134/134), done.
Note: checking out '8b42c4e7175e5d28c57d72dade99c52a144bec1f'.

You are in 'detached HEAD' state. You can look around, make experimental
changes and commit them, and you can discard any commits you make in this
state without impacting any branches by performing another checkout.

If you want to create a new branch to retain commits you create, you may
do so (now or later) by using -b with the checkout command again. Example:

  git checkout -b <new-branch-name>

HEAD is now at 8b42c4e717 Version 8.9.270
$ git status
HEAD detached at 8b42c4e717
nothing to commit, working tree clean
$ cd ..
$ time ~/work/cloc-1.88/cloc --quiet --timeout=60 v8

github.com/AlDanial/cloc v 1.88  T=19.90 s (542.6 files/s, 136592.3 lines/s)
---------------------------------------------------------------------------------------
Language                             files          blank        comment           code
---------------------------------------------------------------------------------------
C++                                   1533         137484          93595        1227034
JavaScript                            7520          76782         110335         634044
C/C++ Header                          1326          55731          52482         254340
Python                                 216           7062           6997          29864
JSON                                    41              3              0          12634
TypeScript                              26            642            261           5396
HTML                                    28            430            108           4451
C                                       14            411            200           2051
Bourne Shell                            35            323            487           1400
CSS                                      5            246              5           1212
Markdown                                25            405              0           1194
Scheme                                   1             13             51            222
vim script                               3             28             30            143
WebAssembly                             12             15              0            105
R                                        1             12             22             79
Assembly                                 3             11             59             55
YAML                                     4              4             19             51
XML                                      1              8             16             44
DOS Batch                                2              4              3             29
make                                     1              4             27             15
Windows Module Definition                1              0              0              5
Bourne Again Shell                       1              2              3              3
---------------------------------------------------------------------------------------
SUM:                                 10799         279620         264700        2174371
---------------------------------------------------------------------------------------

real	0m20.109s
user	0m12.909s
sys	0m6.805s

C, C++, Assembly だけに絞ると約148万LOC
blink が v8 よりも若干規模が大きい状況だと確認できる

Component	LOC(C/C++/Assembly/Java)
blink	1,760,045
v8	1,483,480

DEPS から Chromium リポジトリとは別に管理されているライブラリを確認する

v8 と同じように Chromium リポジトリとは別に管理されているライブラリが下記のように確認できる

これら全てを Chromium として LOC をカウントし始めると、どのライブラリまでが Chromium の一部だと扱われるべきで、どのライブラリは外部ライブラリとして扱われるべきなのか？という議論になってしまうだろう。
JavaScriptエンジンである v8 は Chromium の一部として扱うほうが Chromiumの規模を確認するには適切に思える。その他のライブラリはどう扱うべきだろうか？

$ grep -e _git DEPS | grep -e https
  'android_git': 'https://android.googlesource.com',
  'aomedia_git': 'https://aomedia.googlesource.com',
  'boringssl_git': 'https://boringssl.googlesource.com',
  'chromium_git': 'https://chromium.googlesource.com',
  'dawn_git': 'https://dawn.googlesource.com',
  'pdfium_git': 'https://pdfium.googlesource.com',
  'quiche_git': 'https://quiche.googlesource.com',
  'skia_git': 'https://skia.googlesource.com',
  'swiftshader_git': 'https://swiftshader.googlesource.com',
  'webrtc_git': 'https://webrtc.googlesource.com',

$ grep -e android_git \
 -e aomedia_git \
-e boringssl_git \
-e chromium_git \
-e dawn_git \
-e pdfium_git \
-e quiche_git \
-e skia_git \
-e swiftshader_git \
-e webrtc_git DEPS | cat -n
     1	  'android_git': 'https://android.googlesource.com',
     2	  'aomedia_git': 'https://aomedia.googlesource.com',
     3	  'boringssl_git': 'https://boringssl.googlesource.com',
     4	  'chromium_git': 'https://chromium.googlesource.com',
     5	  'dawn_git': 'https://dawn.googlesource.com',
     6	  'pdfium_git': 'https://pdfium.googlesource.com',
     7	  'quiche_git': 'https://quiche.googlesource.com',
     8	  'skia_git': 'https://skia.googlesource.com',
     9	  'swiftshader_git': 'https://swiftshader.googlesource.com',
    10	  'webrtc_git': 'https://webrtc.googlesource.com',
    11	    Var('chromium_git') + '/chromium/llvm-project/cfe/tools/clang-format.git@' +
    12	    Var('chromium_git') +
    13	    Var('chromium_git') +
    14	    Var('chromium_git') +
    15	    Var('chromium_git') + '/media_router.git' + '@' + 'd4389c097c61fa8c5aa5eb7c3ba34ee203dd62e3',
    16	      'url': Var('chromium_git') + '/chromium/deps/xz.git' + '@' + 'eecaf55632ca72e90eb2641376bce7cdbc7284f7',
    17	    Var('chromium_git') + '/chromium/canvas_bench.git' + '@' + 'a7b40ea5ae0239517d78845a5fc9b12976bfc732',
    18	    Var('chromium_git') + '/chromium/frame_rate/content.git' + '@' + 'c10272c88463efeef6bb19c9ec07c42bc8fe22b9',
    19	    Var('chromium_git') + '/external/github.com/toji/webvr.info.git' + '@' + 'c58ae99b9ff9e2aa4c524633519570bf33536248',
    20	      'url': Var('chromium_git') + '/external/github.com/google/EarlGrey.git' + '@' + 'ff524fb646253b0cbc05aa6d0b327b6b3ddd0385',
    21	      'url': Var('chromium_git') + '/external/github.com/google/EarlGrey.git' + '@' + '891b1b683a7ed73f98f8064672a95ca77060df42',
    22	      'url': Var('chromium_git') + '/external/github.com/google/eDistantObject.git' + '@' + '91c532d921e1f37f7e0f213c534df16df6061ec1',
    23	      'url': Var('chromium_git') + '/external/github.com/google/GTXiLib.git' + '@' + '3e09baa61b2c13fe98029d53b1783f4ca9edaabf',
    24	      'url': Var('chromium_git') + '/external/github.com/facebook/fishhook.git' + '@' + '66315a9c251edfe92f669ae2deeac0d75374c948',
    25	      'url': Var('chromium_git') + '/external/github.com/swisspol/GCDWebServer.git' + '@' + '43555c66627f6ed44817855a0f6d465f559d30e0',
    26	      'url': Var('chromium_git') + '/external/github.com/material-components/material-components-ios.git' + '@' + '6cf2fb727b73cf7ac8ef0722b4de8afdfd1bdf9d',
    27	      'url': Var('chromium_git') + '/external/github.com/material-foundation/material-font-disk-loader-ios.git' + '@' + '93acc021e3034898716028822cb802a3a816be7e',
    28	      'url': Var('chromium_git') + '/external/github.com/material-foundation/material-internationalization-ios.git' + '@' + 'd8f32464ac97d5551c8db19de916170ae87cfa90',
    29	      'url': Var('chromium_git') + '/external/github.com/material-foundation/material-roboto-font-loader-ios.git' + '@' + '4aa51e906e5671c71d24e991f1f10d782a58409f',
    30	      'url': Var('chromium_git') + '/external/github.com/material-foundation/material-sprited-animation-view-ios.git' + '@' + '8af9adaa182044cf2920dfb620b863669e1aeb7c',
    31	      'url': Var('chromium_git') + '/external/github.com/material-foundation/material-text-accessibility-ios.git' + '@' + '499b45d1895b565096302a209c0c728df03b95d4',
    32	      'url': Var('chromium_git') + '/external/github.com/material-motion/motion-interchange-objc.git' + '@' + '8e25f1ca599543dc77e4016b588763dcba6cbac8',
    33	      'url': Var('chromium_git') + '/external/github.com/material-motion/motion-animator-objc.git' + '@' + '0581bc3dfacd34e40381e9cf45a15070b3868ba7',
    34	      'url': Var('chromium_git') + '/external/github.com/material-motion/motion-transitioning-objc.git' + '@' + '5bb0d577dd78472536480496ace115bc593ed0e1',
    35	      'url': Var('chromium_git') + '/external/github.com/hamcrest/OCHamcrest.git' + '@' + '92d9c14d13bb864255e65c09383564653896916b',
    36	      'url': Var('chromium_git') + '/external/github.com/WebKit/webkit.git' +
    37	    Var('chromium_git') + '/chromium/cdm.git' + '@' + 'fc5afac6847dc61addc1177103aa602e71a9ecac',
    38	      'url': Var('chromium_git') + '/native_client/src/native_client.git' + '@' + Var('nacl_revision'),
    39	    Var('quiche_git') + '/quiche.git' + '@' +  Var('quiche_revision'),
    40	    Var('chromium_git') + '/external/github.com/google/shaderc.git@' +
    41	      'url': Var('android_git') + '/platform/external/protobuf.git' + '@' + '7fca48d8ce97f7ba3ab8eea5c472f1ad3711762f',
    42	      'url': Var('chromium_git') + '/android_ndk.git' + '@' + '27c0a8d090c666a50e40fceb4ee5b40b1a2d3f87',
    43	      'url': Var('chromium_git') + '/external/gob/android/platform/frameworks/support/browser.git' + '@' + '65086eb5e52c16778fa7b4f157156d17b176fcb3',
    44	    Var('chromium_git') + '/angle/angle.git' + '@' +  Var('angle_revision'),
    45	    Var('chromium_git') + '/external/github.com/videolan/dav1d.git' + '@' + '441e643915bea71a0234d85121109d2816f18984',
    46	    Var('dawn_git') + '/dawn.git' + '@' +  Var('dawn_revision'),
    47	    Var('dawn_git') + '/tint.git' + '@' +  Var('tint_revision'),
    48	    Var('chromium_git') + '/external/github.com/glfw/glfw.git@' +  '2de2589f910b1a85905f425be4d32f33cec092df',
    49	      'url': Var('chromium_git') + '/external/apache-portable-runtime.git' + '@' + 'c3f11fcd86b42922834cae91103cf068246c6bb6',
    50	    'url': Var('chromium_git') + '/external/github.com/google/benchmark.git' + '@' + 'ffe1342eb2faa7d2e7c35b4db2ccf99fab81ec20',
    51	    Var('boringssl_git') + '/boringssl.git' + '@' +  Var('boringssl_revision'),
    52	    Var('chromium_git') + '/breakpad/breakpad.git' + '@' + 'e3d485f73f5836fdd6fb287ab96973c4f63175e1',
    53	    Var('chromium_git') + '/catapult.git' + '@' + Var('catapult_revision'),
    54	    Var('chromium_git') + '/external/github.com/google/compact_enc_det.git' + '@' + 'ba412eaaacd3186085babcd901679a48863c7dd5',
    55	      'url': Var('chromium_git') + '/chromiumos/chromite.git' + '@' + 'd46475f87758f99f2eb030682f32b69957d152c8',
    56	    Var('chromium_git') + '/external/github.com/google/cld_3.git' + '@' + '06f695f1c8ee530104416aab5dcf2d6a1414a56a',
    57	    Var('chromium_git') + '/external/colorama.git' + '@' + '799604a1041e9b3bc5d2789ecbd7e8db2e18e6b8',
    58	    Var('chromium_git') + '/external/github.com/google/crc32c.git' + '@' + '5998f8451548244de8cde7fab387a550e7c4497d',
    59	      'url': Var('chromium_git') + '/chromiumos/platform2/system_api.git' + '@' + '42f3f3cea40612784b38532b9e5d1a54a3d2174c',
    60	    Var('chromium_git') + '/chromium/tools/depot_tools.git' + '@' + '9b5dd7ab8a98140a1b73b9dea29245605137cd09',
    61	    Var('chromium_git') + '/devtools/devtools-frontend' + '@' + Var('devtools_frontend_revision'),
    62	    Var('chromium_git') + '/chromium/dom-distiller/dist.git' + '@' + 'f339eb9463714c3d31657c8ee1bd53d1c7e5c555',
    63	    Var('chromium_git') + '/external/gitlab.com/libeigen/eigen.git' + '@' + '2ce2f5198929caab4b41a6ad1b9c93f67d8b9a69',
    64	    'url': Var('chromium_git') + '/external/github.com/googlefonts/emoji-metadata' + '@' + '9d8e5cfe52ee763b7dd91e33e5a50250efbf7135',
    65	    Var('chromium_git') + '/external/github.com/google/farmhash.git' + '@' + '816a4ae622e964763ca0862d9dbd19324a1eaf45',
    66	    Var('chromium_git') + '/chromium/third_party/ffmpeg.git' + '@' + '841aa72c9e153ae5f952e31e4b6406870555922d',
    67	    Var('chromium_git') + '/chromium/deps/flac.git' + '@' + 'af862024c8c8fa0ae07ced05e89013d881b00596',
    68	    Var('chromium_git') + '/external/github.com/google/flatbuffers.git' + '@' + '6df40a2471737b27271bdd9b900ab5f3aec746c7',
    69	      'url': Var('chromium_git') + '/external/fontconfig.git' + '@' + '452be8125f0e2a18a7dfef469e05d19374d36307',
    70	    Var('chromium_git') + '/external/github.com/Maratyszcza/FP16.git' + '@' + 'febbb1c163726b5db24bed55cc9dc42529068997',
    71	    Var('chromium_git') + '/external/github.com/google/gemmlowp.git' + '@' + 'fda83bdc38b118cc6b56753bd540caa49e570745',
    72	      'url': Var('chromium_git') + '/external/github.com/grpc/grpc.git' + '@' + '4ac9c6f755463a2321f84b0cb2d631e1828faedb',
    73	    Var('chromium_git') + '/chromium/src/third_party/freetype2.git' + '@' + Var('freetype_revision'),
    74	    Var('chromium_git') + '/external/github.com/freetype/freetype2-testing.git' + '@' + Var('freetype_testing_revision'),
    75	    Var('chromium_git') + '/external/github.com/harfbuzz/harfbuzz.git' + '@' + Var('harfbuzz_revision'),
    76	    Var('chromium_git') + '/external/github.com/google/emoji-segmenter.git' + '@' + Var('emoji_segmenter_revision'),
    77	    Var('chromium_git') + '/codecs/libgav1.git' + '@' + 'a5ee0e00923c355ef3aad2b2829365a9fde84430',
    78	      'url': Var('chromium_git') + '/external/github.com/google/google-toolbox-for-mac.git' + '@' + Var('google_toolbox_for_mac_revision'),
    79	    Var('chromium_git') + '/external/github.com/google/googletest.git' + '@' + Var('googletest_revision'),
    80	      'url': Var('chromium_git') + '/native_client/deps/third_party/gnu_binutils.git' + '@' + 'f4003433b61b25666565690caf3d7a7a1a4ec436',
    81	      'url': Var('chromium_git') + '/chromium/deps/gperf.git' + '@' + 'd892d79f64f9449770443fb06da49b5a1e5d33c1',
    82	      'url': Var('chromium_git') + '/external/github.com/googlevr/gvr-android-sdk.git' + '@' + '233e7fe922a543e0bc55382d64cacd047307d0e7',
    83	      'url': Var('chromium_git') + '/external/github.com/google-ar/arcore-android-sdk.git' + '@' + '54861e38cceb406021fc8ece495f82387376af62',
    84	    Var('chromium_git') + '/chromium/deps/hunspell_dictionaries.git' + '@' + '18e09b9197a3b1d771c077c530d1a4ebad04c167',
    85	    Var('chromium_git') + '/chromium/deps/icu.git' + '@' + '899e18383fd732b47e6978db2b960a1b2a80179b',
    86	      'url': Var('chromium_git') + '/external/github.com/c2nes/javalang.git' + '@' + 'f98ffcb31d1daa57fbe5bd6def8ad7c3126d8242',
    87	    Var('chromium_git') + '/external/github.com/open-source-parsers/jsoncpp.git'
    88	      'url': Var('chromium_git') + '/external/junit.git' + '@' + '64155f8a9babcfcf4263cf4d08253a1556e75481',
    89	    Var('chromium_git') + '/external/leveldb.git' + '@' + 'c46e79c760125f9adb87a575d94034032637f8d0',
    90	    Var('chromium_git') + '/chromium/llvm-project/compiler-rt/lib/fuzzer.git' + '@' +  Var('libfuzzer_revision'),
    91	    Var('chromium_git') + '/external/libaddressinput.git' + '@' + '390dfc08e3806a2125d08d4d8d034a24d587d77a',
    92	    Var('aomedia_git') + '/aom.git' + '@' +  '43927e4611e7c3062a67ebaca38a625faa9a39d6',
    93	    Var('chromium_git') + '/external/github.com/AOMediaCodec/libavif.git' + '@' + Var('libavif_revision'),
    94	    Var('chromium_git') + '/external/github.com/google/nearby-connections.git' + '@' + Var('nearby_revision'),
    95	    Var('chromium_git') + '/external/github.com/google/securemessage.git' + '@' + Var('securemessage_revision'),
    96	    Var('chromium_git') + '/external/github.com/google/ukey2.git' + '@' + Var('ukey2_revision'),
    97	      'url': Var('chromium_git') + '/chromiumos/third_party/libdrm.git' + '@' + '0190f49a139e7069d7cad6a6890832831da1aa8b',
    98	    Var('chromium_git') + '/external/github.com/libexpat/libexpat.git' + '@' + Var('libexpat_revision'),
    99	      'url': Var('chromium_git') + '/chromiumos/platform2/libipp.git' + '@' + '6c45a4f3a05cb5dd700414fe4d94cf685159d3ce',
   100	    Var('chromium_git') + '/chromium/deps/libjpeg_turbo.git' + '@' + '518d81558c797486e125e37cb529d65b560a6ea0',
   101	      'url': Var('chromium_git') + '/external/liblouis-github.git' + '@' + '03d7d72d983d47c17f7de95bbeae89fe33e41943',
   102	    Var('chromium_git') + '/external/libphonenumber.git' + '@' + '68eba9d6ee8b11fb58ece36b6c46d07965d7f7ff',
   103	    Var('chromium_git') + '/external/github.com/google/libprotobuf-mutator.git' + '@' +  Var('libprotobuf-mutator'),
   104	    Var('chromium_git') + '/chromium/deps/libsrtp.git' + '@' + '7990ca64c616b150a9cb4714601c4a3b0c84fe91',
   105	      'url': Var('chromium_git') + '/aosp/platform/system/core/libsync.git' + '@' + 'f4f4387b6bf2387efbcfd1453af4892e8982faf6',
   106	      'url': Var('chromium_git') + '/chromium/src/third_party/libunwindstack.git' + '@' + '11659d420a71e7323b379ea8781f07c6f384bc7e',
   107	    Var('chromium_git') + '/webm/libvpx.git' + '@' +  'b5d77a48d740e211a130c8e45d9353ef8c154a47',
   108	    Var('chromium_git') + '/webm/libwebm.git' + '@' + '51ca718c3adf0ddedacd7df25fe45f67dc5a9ce1',
   109	    Var('chromium_git') + '/libyuv/libyuv.git' + '@' + '93b1b332cd60b56ab90aea14182755e379c28a80',  # from r1770
   110	      'url': Var('chromium_git') + '/chromium/deps/lighttpd.git' + '@' + Var('lighttpd_revision'),
   111	      'url': Var('chromium_git') + '/linux-syscall-support.git' + '@' + Var('lss_revision'),
   112	      'url': Var('chromium_git') + '/external/github.com/google/material-design-icons.git' + '@' +
   113	      'url': Var('chromium_git') + '/native_client/deps/third_party/mingw-w64/mingw/bin.git' + '@' + '3cc8b140b883a9fe4986d12cfd46c16a093d3527',
   114	      'url': Var('chromium_git') + '/chromiumos/platform/minigbm.git' + '@' + 'bc4f023bfcc51cf9dcfcfec5bf4177b2e607dd68',
   115	      'url': Var('chromium_git') + '/external/github.com/nmoinvaz/minizip' + '@' + '1ff40343b55e738d941abb51c70eddb803db16e2',
   116	      'url': Var('chromium_git') + '/external/mockito/mockito.git' + '@' + '04a2a289a4222f80ad20717c25144981210d2eac',
   117	      'url': Var('chromium_git') + '/chromium/deps/nacl_sdk_binaries.git' + '@' + '759dfca03bdc774da7ecbf974f6e2b84f43699a5',
   118	      'url': Var('chromium_git') + '/chromium/deps/nasm.git' + '@' +
   119	    Var('chromium_git') + '/external/github.com/intel/ARM_NEON_2_x86_SSE.git' + '@' + '42b2bebacee25452e150095ef4480b3fa26e30f5',
   120	      'url': Var('chromium_git') + '/external/netty-tcnative.git' + '@' + '5b46a8ef4a39c39c576fcdaaf718b585d75df463',
   121	      'url': Var('chromium_git') + '/external/netty4.git' + '@' + 'cc4420b13bb4eeea5b1cf4f93b2755644cd3b120',
   122	    Var('chromium_git') + '/external/github.com/cisco/openh264' + '@' + '3dd5b80bc4f172dd82925bb259cb7c82348409c5',
   123	    Var('chromium_git') + '/openscreen' + '@' + '6051838253185d8478f5fa4d70c96ef6c0241f94',
   124	    'url': Var('chromium_git') + '/external/github.com/KhronosGroup/OpenXR-SDK' + '@' + '97cfe495bb7a3853266b646d1c79e169387f9c7a',
   125	    Var('pdfium_git') + '/pdfium.git' + '@' +  Var('pdfium_revision'),
   126	      'url': Var('chromium_git') + '/external/pefile.git' + '@' + '72c6ae42396cb913bcab63c15585dc3b5c3f92f1',
   127	    Var('android_git') + '/platform/external/perfetto.git' + '@' + '704a1aa4c802df97a8203e052b77db2eabdb317a',
   128	      'url': Var('chromium_git') + '/chromium/deps/perl.git' + '@' + '6f3e5028eb65d0b4c5fdd792106ac4c84eee1eb3',
   129	      'url': Var('chromium_git') + '/chromiumos/third_party/pyelftools.git' + '@' + '19b3e610c86fcadb837d252c794cb5e8008826ae',
   130	    Var('chromium_git') + '/external/github.com/google/quic-trace.git' + '@' + '2dccbe8e996d43c6d93b69e4f6d024f015e8c488',
   131	    Var('chromium_git') + '/external/github.com/GoogleChromeLabs/pywebsocket3.git' + '@' + 'faf478a0453ceae78f2a3bc11c6c21e13362628f',
   132	    Var('chromium_git') + '/external/github.com/google/re2.git' + '@' + 'c33d1680c7e9ab7edea02d7465a8db13e80b558d',
   133	      'url': Var('chromium_git') + '/external/github.com/kennethreitz/requests.git' + '@' + 'c7e0fc087ceeadb8b4c84a0953a422c474093d6d',
   134	    Var('chromium_git') + '/external/github.com/google/ruy.git' + '@' + '34ea9f4993955fa1ff4eb58e504421806b7f2e8f',
   135	    Var('skia_git') + '/skia.git' + '@' +  Var('skia_revision'),
   136	    Var('chromium_git') + '/external/smhasher.git' + '@' + 'e87738e57558e0ec472b2fc3a643b838e5b6e88f',
   137	    Var('chromium_git') + '/external/github.com/google/snappy.git' + '@' + 'ea368c2f07de5f31146a10214f27d15091b09771',
   138	    Var('chromium_git') + '/chromium/deps/sqlite.git' + '@' + '702a79c7d77331cbe2838c4b3c5fab529f75f7c2',
   139	    Var('swiftshader_git') + '/SwiftShader.git' + '@' +  Var('swiftshader_revision'),
   140	    'url': Var('chromium_git') + '/external/github.com/GoogleChromeLabs/text-fragments-polyfill.git' + '@' + '90a76f78e73579ab6bc4f300953cec39b27d058b',
   141	    Var('chromium_git') + '/external/github.com/tensorflow/tensorflow.git' + '@' + 'fcc4b966f1265f466e82617020af93670141b009',
   142	      'url': Var('chromium_git') + '/external/github.com/google/turbine.git' + '@' + '3c31e67ae25b5e43713fd868e3a9b535ff6298af',
   143	      'url': Var('chromium_git') + '/chromium/third_party/ub-uiautomator.git' + '@' + '00270549ce3161ae72ceb24712618ea28b4f9434',
   144	    Var('chromium_git') + '/external/github.com/sctplab/usrsctp' + '@' + 'a3c3ef666b7a5e4c93ebae5a7462add6f86f5cf2',
   145	  'src/third_party/vulkan-deps': '{chromium_git}/vulkan-deps@e59ae1af7571c2994183768c2a36fff8b1854437',
   146	    Var('chromium_git') + '/external/github.com/GPUOpen-LibrariesAndSDKs/VulkanMemoryAllocator.git' + '@' + '6c656df63da5995a932aafd45b32af1974e497d9',
   147	      'url': Var('chromium_git') + '/external/anongit.freedesktop.org/git/wayland/wayland.git' + '@' + 'eb1339edd398b9f5328816931e585db4229aa132',
   148	      'url': Var('chromium_git') + '/external/anongit.freedesktop.org/git/wayland/wayland-protocols.git' + '@' + '684cd23ae31fafb9eda2a0cd15edb4e96de92259',
   149	      'url': Var('chromium_git') + '/external/github.com/01org/wds' + '@' + 'a488b169d724d6b4cfcd7037dbab1f1c2bf04f3b',
   150	    Var('chromium_git') + '/external/github.com/SeleniumHQ/selenium/py.git' + '@' + 'd0045ec570c1a77612db35d1e92f05e1d27b4d53',
   151	    Var('chromium_git') + '/external/khronosgroup/webgl.git' + '@' + '3e3f152617996e4a175fd0b597a1936824b371f3',
   152	    Var('chromium_git') + '/external/github.com/gpuweb/cts.git' + '@' + '3c2fe3888658d82b47ca831d59a2e07579619c2d',
   153	    Var('webrtc_git') + '/src.git' + '@' + '1c5e63e5451374783aaf0259f5c23d3688a5b2ff',
   154	     Var('skia_git') + '/libgifcodec' + '@'+  Var('libgifcodec_revision'),
   155	    Var('skia_git') + '/external/github.com/google/wuffs.git' + '@' +  Var('wuffs_revision'),
   156	      'url': Var('chromium_git') + '/external/anongit.freedesktop.org/git/wayland/weston.git' + '@' + 'db905f467169f9f131c5ddc6038296f866d5daeb',
   157	      'url': Var('chromium_git') + '/chromium/deps/xdg-utils.git' + '@' + 'd80274d5869b17b8c9067a1022e4416ee7ed5e0d',
   158	    Var('chromium_git') + '/chromium/deps/acid3.git' + '@' + '6be0a66a1ebd7ebc5abc1b2f405a945f6d871521',
   159	    Var('chromium_git') + '/infra/luci/client-py.git' + '@' +  Var('swarming_revision'),
   160	    Var('chromium_git') + '/v8/v8.git' + '@' +  Var('v8_revision'),
   161	      'url': Var('android_git') + '/platform/prebuilts/build-tools.git' + '@' + '5794e96eb8bae47bb48feee915d99583573b3887',