Create Monochrome-specific repack() targets

android_webview/BUILD.gn

Index: android_webview/BUILD.gn
diff --git a/android_webview/BUILD.gn b/android_webview/BUILD.gn
index c2cbd8bbb238725f21e511c4e3f4a07815143491..5a688a3bbe190e4cc8054f93889fe95a10ebc132 100644
--- a/android_webview/BUILD.gn
+++ b/android_webview/BUILD.gn
@@ -5,6 +5,7 @@
 import("//build/config/android/config.gni")
 import("//build/config/android/rules.gni")
 import("//build/config/locales.gni")
+import("//chrome/chrome_paks.gni")
 import("//tools/grit/repack.gni")
 import("//tools/resources/generate_resource_whitelist.gni")
 import("system_webview_apk_tmpl.gni")
@@ -18,6 +19,10 @@ declare_args() {
 if (!defined(use_webview_internal_framework)) {
   use_webview_internal_framework = false
 }
+if (enable_resource_whitelist_generation) {
+  monochrome_resource_whitelist =
+      "$target_gen_dir/monochrome_resource_whitelist.txt"
+}
 
 if (enable_resource_whitelist_generation) {
   system_webview_pak_whitelist =
@@ -168,7 +173,46 @@ android_assets("pak_file_assets") {
   disable_compression = true
 }
 
-# These assets are needed by both monochrome and stand alone WebView, but not by
+if (enable_resource_whitelist_generation) {
+  generate_resource_whitelist("monochrome_resource_whitelist") {
+    deps = [
+      "//chrome/android:monochrome",
+    ]
+    input = "$root_out_dir/libmonochrome$shlib_extension.whitelist"
+    output = monochrome_resource_whitelist
+  }
+}
+
+chrome_paks("monochrome_paks") {
+  output_dir = "$target_gen_dir/$target_name"
+
+  if (enable_resource_whitelist_generation) {
+    repack_whitelist = monochrome_resource_whitelist
+    deps = [
+      ":monochrome_resource_whitelist",
+    ]
+  }
+}
+
+java_group("monochrome_assets") {
+  deps = [
+    ":monochrome_pak_assets",
+    ":monochrome_webview_assets",
+  ]
+}
+
+android_assets("monochrome_pak_assets") {
+  sources = [
+    "$target_gen_dir/monochrome_paks/chrome_100_percent.pak",
+    "$target_gen_dir/monochrome_paks/resources.pak",
+  ]
+  deps = [
+    ":monochrome_paks",
+  ]
+  disable_compression = true
+}
+
+# These assets are needed by both monochrome and standalone WebView, but not by
 # Chrome.
 android_assets("monochrome_webview_assets") {
   sources = [