DevTools: Add lighthouse locale files to the audits worker module

As per the plan [1] to localize the Audits Panel, this CL adds locale
files in the lighthouse repo [2] to audits_worker/lighthouse/locales/.
The files are copied to the output folder that's uploaded to the remote
server (out/Release/resources/inspector/audits_worker/lighthouse/locales)
and they are not bundled into audits_worker_module.js. They are also not
bundled with the default (non-remote) devtools (out/Release/gen/devtools).

Screenshots: https://imgur.com/a/hZiufh4


[1]: https://docs.google.com/document/d/1jnt3BqKB-4q3AE94UWFA0Gqspx8Sd_jivlB7gQMlmfk/edit?pli=1
[2]: https://github.com/GoogleChrome/lighthouse/tree/master/lighthouse-core/lib/i18n/locales


Bug: 941561
Change-Id: I6c6572ceef6f94ebd5ff46cc17a83c21f8708221
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1784959Reviewed-by: Erik Luo <luoe@chromium.org>
Reviewed-by: Paul Irish <paulirish@chromium.org>
Commit-Queue: Mandy Chen <mandy.chen@microsoft.com>
Cr-Commit-Position: refs/heads/master@{#695211}

third_party/blink/renderer/devtools/BUILD.gn

@@ -905,6 +905,59 @@ all_devtools_files = [
   "front_end/workspace_diff/module.json",
 ]
 
+lighthouse_locale_files = [
+  "front_end/audits_worker/lighthouse/locales/ar-XB.json",
+  "front_end/audits_worker/lighthouse/locales/ar.json",
+  "front_end/audits_worker/lighthouse/locales/bg.json",
+  "front_end/audits_worker/lighthouse/locales/ca.json",
+  "front_end/audits_worker/lighthouse/locales/cs.json",
+  "front_end/audits_worker/lighthouse/locales/da.json",
+  "front_end/audits_worker/lighthouse/locales/de.json",
+  "front_end/audits_worker/lighthouse/locales/el.json",
+  "front_end/audits_worker/lighthouse/locales/en-GB.json",
+  "front_end/audits_worker/lighthouse/locales/en-US.json",
+  "front_end/audits_worker/lighthouse/locales/en-XA.json",
+  "front_end/audits_worker/lighthouse/locales/en-XL.json",
+  "front_end/audits_worker/lighthouse/locales/es-419.json",
+  "front_end/audits_worker/lighthouse/locales/es.json",
+  "front_end/audits_worker/lighthouse/locales/fi.json",
+  "front_end/audits_worker/lighthouse/locales/fil.json",
+  "front_end/audits_worker/lighthouse/locales/fr.json",
+  "front_end/audits_worker/lighthouse/locales/he.json",
+  "front_end/audits_worker/lighthouse/locales/hi.json",
+  "front_end/audits_worker/lighthouse/locales/hr.json",
+  "front_end/audits_worker/lighthouse/locales/hu.json",
+  "front_end/audits_worker/lighthouse/locales/id.json",
+  "front_end/audits_worker/lighthouse/locales/it.json",
+  "front_end/audits_worker/lighthouse/locales/ja.json",
+  "front_end/audits_worker/lighthouse/locales/ko.json",
+  "front_end/audits_worker/lighthouse/locales/lt.json",
+  "front_end/audits_worker/lighthouse/locales/lv.json",
+  "front_end/audits_worker/lighthouse/locales/nl.json",
+  "front_end/audits_worker/lighthouse/locales/no.json",
+  "front_end/audits_worker/lighthouse/locales/pl.json",
+  "front_end/audits_worker/lighthouse/locales/pt-PT.json",
+  "front_end/audits_worker/lighthouse/locales/pt.json",
+  "front_end/audits_worker/lighthouse/locales/ro.json",
+  "front_end/audits_worker/lighthouse/locales/ru.json",
+  "front_end/audits_worker/lighthouse/locales/sk.json",
+  "front_end/audits_worker/lighthouse/locales/sl.json",
+  "front_end/audits_worker/lighthouse/locales/sr-Latn.json",
+  "front_end/audits_worker/lighthouse/locales/sr.json",
+  "front_end/audits_worker/lighthouse/locales/sv.json",
+  "front_end/audits_worker/lighthouse/locales/ta.json",
+  "front_end/audits_worker/lighthouse/locales/te.json",
+  "front_end/audits_worker/lighthouse/locales/th.json",
+  "front_end/audits_worker/lighthouse/locales/tr.json",
+  "front_end/audits_worker/lighthouse/locales/uk.json",
+  "front_end/audits_worker/lighthouse/locales/vi.json",
+  "front_end/audits_worker/lighthouse/locales/zh-HK.json",
+  "front_end/audits_worker/lighthouse/locales/zh-TW.json",
+  "front_end/audits_worker/lighthouse/locales/zh.json",
+]
+
+all_devtools_files += lighthouse_locale_files
+
 devtools_test_files = [
   "front_end/accessibility_test_runner/AccessibilityPaneTestRunner.js",
   "front_end/accessibility_test_runner/module.json",
@@ -1226,6 +1279,7 @@ devtools_frontend_resources_deps = [
   ":copy_emulated_devices_images",
   ":copy_htaccess",
   ":copy_inspector_images",
+  ":copy_lighthouse_locale_files",
   ":devtools_extension_api",
   ":frontend_protocol_sources",
   ":supported_css_properties",
@@ -1278,6 +1332,13 @@ copy("copy_emulated_devices_images") {
   ]
 }
 
+copy("copy_lighthouse_locale_files") {
+  sources = lighthouse_locale_files
+  outputs = [
+    "$resources_out_dir/audits_worker/lighthouse/locales/{{source_file_part}}",
+  ]
+}
+
 action("generate_devtools_grd") {
   script = "scripts/build/generate_devtools_grd.py"
 
@@ -1292,7 +1353,8 @@ action("generate_devtools_grd") {
 
   # Bundle remote modules in ChromeOS.
   if (is_chromeos) {
-    grd_files += generated_remote_modules + devtools_emulated_devices_images
+    grd_files += generated_remote_modules + devtools_emulated_devices_images +
+                 lighthouse_locale_files
   }
 
   inputs = grd_files + devtools_image_files

third_party/blink/renderer/devtools/front_end/audits_worker/lighthouse/README.chromium

@@ -6,3 +6,7 @@ Security Critical: no
 
 This directory contains Chromium's version of lighthouse with tests, demo and sources removed.
 
+The locales/ folder is not bundled with audits_worker_module.js. Instead, the files are hosted separately
+on the remote server. The appropriate locale file will be fetched and its content registered with lighthouse
+before running audits.
+More info on the lighthouse localization process: https://docs.google.com/document/d/1jnt3BqKB-4q3AE94UWFA0Gqspx8Sd_jivlB7gQMlmfk/edit
\ No newline at end of file