Add an XPC service to handle alert notifications on mac

chrome/BUILD.gn

Index: chrome/BUILD.gn
diff --git a/chrome/BUILD.gn b/chrome/BUILD.gn
index 268328b6710a39f18f7404924e3ba3402d5cf181..ade20fc84273420150aa323521e8b1f33351722b 100644
--- a/chrome/BUILD.gn
+++ b/chrome/BUILD.gn
@@ -472,6 +472,20 @@ if (is_win) {
     }
   }
 
+  bundle_data("chrome_framework_services") {
+    sources = [
+      "$root_out_dir/AlertNotificationService.xpc",
+    ]
+
+    outputs = [
+      "{{bundle_root_dir}}/XPCServices/{{source_file_part}}",
+    ]
+
+    public_deps = [
+      "//chrome/browser/ui/cocoa/notifications:alert_notification_xpc_service",
+    ]
+  }
+
   tweak_info_plist("chrome_app_plist") {
     info_plist = "app/app-Info.plist"
     _keystone_arg = "0"
@@ -992,6 +1006,7 @@ if (is_win) {
       ":chrome_framework_helpers",
       ":chrome_framework_plugins",
       ":chrome_framework_resources",
+      ":chrome_framework_services",
       ":packed_resources",
       ":widevine_cdm_library",
       "//build/config/sanitizers:deps",