Reland of 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 9bdf03faec931bd9c0bba129bc6250ec30f09a36..ca5addba80a428e227d48e35757a382d765a6961 100644
--- a/chrome/android/BUILD.gn
+++ b/chrome/android/BUILD.gn
@@ -41,6 +41,10 @@ app_hooks_impl = "java/src/org/chromium/chrome/browser/AppHooksImpl.java"
 if (enable_resource_whitelist_generation) {
   monochrome_resource_whitelist =
       "$target_gen_dir/monochrome_resource_whitelist.txt"
+  system_webview_locale_resource_id_list =
+      "$target_gen_dir/system_webview_locale_resource_id_list.txt"
+  monochrome_locale_whitelist =
+      "$target_gen_dir/monochrome_locale_whitelist.txt"
 }
 
 jinja_template("chrome_public_android_manifest") {
@@ -730,9 +734,66 @@ if (current_toolchain == default_toolchain) {
               "/libmonochrome$shlib_extension.whitelist"
       output = monochrome_resource_whitelist
     }
+    
+    # Use custom resource ID list instead of android_webview's compiler
+    # resource whitelist because //android_webview: generate_webui_resources
+    # and //android_webview: generate_components_resources use hand-written
+    # resource whitelists.
+    action("system_webview_locale_resource_id_list") {
+      script = "//tools/grit/pak_util.py"
+      
+      _system_webview_en_US_locale_pak =
+          "$root_out_dir/android_webview/locales/en-US.pak"
+      
+      inputs = [
+        _system_webview_en_US_locale_pak,
+      ]
+      
+      outputs = [
+        system_webview_locale_resource_id_list,
+      ]
+      
+      deps = [
+        "//android_webview:repack_locales",
+      ]
+      
+      args = [
+        "list-id",
+        "--output",
+        rebase_path(system_webview_locale_resource_id_list, root_build_dir),
+        rebase_path(_system_webview_en_US_locale_pak, root_build_dir),
+      ]
+    }
+    
+    action("monochrome_locale_whitelist") {
+      script = "//tools/resources/filter_resource_whitelist.py"
+      
+      inputs = [
+        monochrome_resource_whitelist,
+        system_webview_locale_resource_id_list,
+      ]
+      
+      outputs = [
+        monochrome_locale_whitelist,
+      ]
+      
+      deps = [
+        ":monochrome_resource_whitelist",
+        ":system_webview_locale_resource_id_list",
+        "//android_webview:system_webview_pak_whitelist",
+      ]
+      
+      args = [
+        "--input",
+        rebase_path(monochrome_resource_whitelist, root_build_dir),
+        "--filter",
+        rebase_path(system_webview_locale_resource_id_list, root_build_dir),
+        "--output",
+        rebase_path(monochrome_locale_whitelist, root_build_dir),
+      ]
+    } 
   }
 
-  # This target does not output locale paks.
   chrome_paks("monochrome_paks") {
     output_dir = "$target_gen_dir/$target_name"
 
@@ -741,12 +802,25 @@ 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.
@@ -758,7 +832,7 @@ 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",
     ]