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diff --git a/third_party/libwebrtc/build/config/locales.gni b/third_party/libwebrtc/build/config/locales.gni
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+# 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.
+
+import("//build/config/chromeos/ui_mode.gni")
+
+# This file creates the |locales| which is the set of current
+# locales based on the current platform. Locales in this list are formated
+# based on what .pak files expect.
+# The |locales| variable *may* contain pseudolocales, depending on the
+# |enable_pseudolocales| flag.
+# If you specifically want to have the locales variable with or without
+# pseudolocales, then use |locales_with_pseudolocales| or
+# |locales_without_pseudolocales|.
+
+# The following additional platform specific lists are created:
+# - |android_bundle_locales_as_resources| locales formatted for XML output names
+# - |locales_as_mac_outputs| formated for mac output bundles
+# - |ios_packed_locales| subset for iOS
+# - |ios_packed_locales_as_mac_outputs| subset for iOS output
+
+# Chrome on iOS only ships with a subset of the locales supported by other
+# version of Chrome as the corresponding locales are not supported by the
+# operating system (but for simplicity, the corresponding .pak files are
+# still generated).
+ios_unsupported_locales = [
+  "am",
+  "bn",
+  "et",
+  "fil",
+  "gu",
+  "kn",
+  "lv",
+  "ml",
+  "mr",
+  "sl",
+  "sw",
+  "ta",
+  "te",
+]
+
+# These list are defined even when not building for Android or iOS for the
+# sake of build/locale_tool.py. Ensure that GN doesn't complain about them
+# being unused.
+not_needed([ "ios_unsupported_locales" ])
+
+# Superset of all locales used in Chrome with platform specific changes noted.
+all_chrome_locales = [
+  "af",
+  "am",
+  "ar",
+  "as",
+  "az",
+  "be",
+  "bg",
+  "bn",
+  "bs",
+  "ca",
+  "cs",
+  "da",
+  "de",
+  "el",
+  "en-GB",
+  "en-US",
+  "es",
+  "es-419",  # "es-MX" in iOS (Mexico vs Latin America) "es-US" on Android
+  "et",
+  "eu",
+  "fa",
+  "fi",
+  "fil",  # "tl" in .xml but "fil" in TC and .pak
+  "fr",
+  "fr-CA",
+  "gl",
+  "gu",
+  "he",  # "iw" in .xml and TC but "he" in .pak
+  "hi",
+  "hr",
+  "hu",
+  "hy",
+  "id",  # "in" in .xml but "id" in TC and .pak
+  "is",
+  "it",
+  "ja",
+  "ka",
+  "kk",
+  "km",
+  "kn",
+  "ko",
+  "ky",
+  "lo",
+  "lt",
+  "lv",
+  "mk",
+  "ml",
+  "mn",
+  "mr",
+  "ms",
+  "my",
+  "nb",  # "no" in TC but "nb" in .xml and .pak
+  "ne",
+  "nl",
+  "or",
+  "pa",
+  "pl",
+  "pt-BR",  # just "pt" in iOS
+  "pt-PT",
+  "ro",
+  "ru",
+  "si",
+  "sk",
+  "sl",
+  "sq",
+  "sr",
+  "sr-Latn",  # -b+sr+Latn in .xml
+  "sv",
+  "sw",
+  "ta",
+  "te",
+  "th",
+  "tr",
+  "uk",
+  "ur",
+  "uz",
+  "vi",
+  "zh-CN",
+  "zh-HK",
+  "zh-TW",
+  "zu",
+]
+
+# New locales added to Chrome Android bundle builds.
+android_bundle_only_locales = [
+  "af",
+  "as",
+  "az",
+  "be",
+  "bs",
+  "eu",
+  "fr-CA",
+  "gl",
+  "hy",
+  "is",
+  "ka",
+  "kk",
+  "km",
+  "ky",
+  "lo",
+  "mk",
+  "mn",
+  "my",
+  "ne",
+  "or",
+  "pa",
+  "si",
+  "sq",
+  "sr-Latn",
+  "ur",
+  "uz",
+  "zh-HK",
+  "zu",
+]
+
+# New locales added to ChromeOS builds.
+chromeos_only_locales = [ "is" ]
+
+if (is_android) {
+  locales = all_chrome_locales
+
+  # List for Android locale names in .xml exports. Note: needs to stay in sync
+  # with |ToAndroidLocaleName| in build/android/gyp/util/resource_utils.py.
+  #  - add r: (e.g. zh-HK -> zh-rHK )
+  android_bundle_locales_as_resources = []
+  foreach(_locale, locales) {
+    android_bundle_locales_as_resources +=
+        [ string_replace(_locale, "-", "-r") ]
+  }
+
+  #  - remove en-US
+  #  - swap: (he, id, en-419, fil) -> (iw, in, es-rUS, tl)
+  #  - sr-rLatn -> -b+sr+Latn
+  android_bundle_locales_as_resources -= [
+    "en-rUS",
+    "es-r419",
+    "fil",
+    "he",
+    "id",
+    "sr-rLatn",
+  ]
+  android_bundle_locales_as_resources += [
+    "b+sr+Latn",
+    "es-rUS",
+    "in",
+    "iw",
+    "tl",
+  ]
+} else if (is_chromeos_ash || is_chromeos_lacros) {
+  # In ChromeOS we support a few more locales than standard Chrome.
+  locales =
+      all_chrome_locales - android_bundle_only_locales + chromeos_only_locales
+} else {
+  # Change if other platforms support more locales.
+  locales = all_chrome_locales - android_bundle_only_locales
+}
+
+# Chrome on iOS uses different names for "es-419" and "pt-BR" (called
+# respectively "es-MX" and "pt" on iOS).
+if (is_ios) {
+  locales -= [
+    "es-419",
+    "pt-BR",
+  ]
+  locales += [
+    "es-MX",
+    "pt",
+  ]
+}
+
+pseudolocales = [
+  "ar-XB",
+  "en-XA",
+]
+locales_without_pseudolocales = locales
+locales_with_pseudolocales = locales + pseudolocales
+
+declare_args() {
+  # We want to give pseudolocales to everyone except end-users (devs & QA).
+  enable_pseudolocales = !is_official_build
+}
+
+if (enable_pseudolocales) {
+  # Note that this only packages the locales in, and doesn't add the ui to enable them.
+  locales += pseudolocales
+}
+
+# Same as the locales list but in the format Mac expects for output files:
+# it uses underscores instead of hyphens, and "en" instead of "en-US".
+locales_as_mac_outputs = []
+foreach(locale, locales) {
+  if (locale == "en-US") {
+    locales_as_mac_outputs += [ "en" ]
+  } else {
+    locales_as_mac_outputs += [ string_replace(locale, "-", "_") ]
+  }
+}
+
+if (is_ios) {
+  ios_packed_locales = locales - ios_unsupported_locales
+  ios_packed_locales_as_mac_outputs =
+      locales_as_mac_outputs - ios_unsupported_locales
+}