Deduplicate Monochrome locale .paks

chrome/android/BUILD.gn

Index: chrome/android/BUILD.gn
diff --git a/chrome/android/BUILD.gn b/chrome/android/BUILD.gn
index 1bb7d1ce0800f6f9749b44c453c1024f15225f68..85b31fb99f46afae873ad4c21209abb6c9417bef 100644
--- a/chrome/android/BUILD.gn
+++ b/chrome/android/BUILD.gn
@@ -40,6 +40,8 @@ app_hooks_impl = "java/src/org/chromium/chrome/browser/AppHooksImpl.java"
 if (enable_resource_whitelist_generation) {
   monochrome_resource_whitelist =
       "$target_gen_dir/monochrome_resource_whitelist.txt"
+  monochrome_locale_whitelist =
+      "$target_gen_dir/monochrome_locale_whitelist.txt"
 }
 
 jinja_template("chrome_public_android_manifest") {
@@ -724,9 +726,39 @@ if (current_toolchain == default_toolchain) {
               "/libmonochrome$shlib_extension.whitelist"
       output = monochrome_resource_whitelist
     }
+    
+    action("monochrome_locale_whitelist") {
+      script = "//tools/resources/filter_resource_whitelist.py"
+      
+      _system_webview_pak_whitelist =
+          "$root_gen_dir/android_webview/system_webview_pak_whitelist.txt"
+      
+      inputs = [
+        monochrome_resource_whitelist,
+        _system_webview_pak_whitelist,
+      ]
+      
+      outputs = [
+        monochrome_locale_whitelist,
+      ]
+      
+      deps = [
+        ":monochrome_resource_whitelist",
+        "//android_webview:system_webview_pak_whitelist",
+      ]
+      
+      args = [
+        "--input",
+        rebase_path(monochrome_resource_whitelist, root_build_dir),
+        "--filter",
+        rebase_path(_system_webview_pak_whitelist, root_build_dir),
+        "--output",
+        rebase_path(monochrome_locale_whitelist, root_build_dir),
+        "--output-directory=.",
+      ]
+    } 
   }
 
-  # This target does not output locale paks.
   chrome_paks("monochrome_paks") {
     output_dir = "$target_gen_dir/$target_name"
 
@@ -735,13 +767,26 @@ if (current_toolchain == default_toolchain) {
       "//android_webview:generate_aw_resources",
     ]
 
-    exclude_locale_paks = true
-
     if (enable_resource_whitelist_generation) {
       repack_whitelist = monochrome_resource_whitelist
       deps += [ ":monochrome_resource_whitelist" ]
+      locale_whitelist = monochrome_locale_whitelist
+      deps += [ ":monochrome_locale_whitelist" ]
     }
   }
+  
+  # This target is separate from monochrome_pak_assets because it does not
+  # disable compression.
+  android_assets("monochrome_locale_pak_assets") {
+    sources = []
+    foreach(_locale, locales - android_chrome_omitted_locales) {
+      sources += [ "$target_gen_dir/monochrome_paks/locales/$_locale.pak" ]
+    }
+  
+    deps = [
+      ":monochrome_paks",
+    ]
+  }
 
   # This target explicitly includes locale paks via deps.
   android_assets("monochrome_pak_assets") {
@@ -752,7 +797,7 @@ if (current_toolchain == default_toolchain) {
     disable_compression = true
 
     deps = [
-      ":chrome_public_locale_pak_assets",
+      ":monochrome_locale_pak_assets",
       ":monochrome_paks",
       "//android_webview:locale_pak_assets",
     ]