use x64 for macos arm64 in component updater request to workaround google updater not providing update for arm64

fix https://github.com/brave/brave-browser/issues/13074

chromium_src/components/update_client/protocol_serializer.cc

@@ -0,0 +1,36 @@
+/* Copyright (c) 2020 The Brave Authors. All rights reserved.
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#define MakeProtocolRequest MakeProtocolRequest_ChromiumImpl
+#include "../../../../components/update_client/protocol_serializer.cc"
+#undef MakeProtocolRequest
+
+namespace update_client {
+
+protocol_request::Request MakeProtocolRequest(
+    const std::string& session_id,
+    const std::string& prod_id,
+    const std::string& browser_version,
+    const std::string& lang,
+    const std::string& channel,
+    const std::string& os_long_name,
+    const std::string& download_preference,
+    const base::flat_map<std::string, std::string>& additional_attributes,
+    const std::map<std::string, std::string>* updater_state_attributes,
+    std::vector<protocol_request::App> apps) {
+  protocol_request::Request request = MakeProtocolRequest_ChromiumImpl(
+      session_id, prod_id, browser_version, lang, channel, os_long_name,
+      download_preference, additional_attributes, updater_state_attributes,
+      std::move(apps));
+#if defined(OS_APPLE) && !defined(__amd64__) && defined(__aarch64__)
+  // temporary workaround for google update server not returning widevine
+  // for arm64
+  request.arch = "x64";
+  request.nacl_arch = "x64";
+#endif
+  return request;
+}
+
+}  // namespace update_client