Enable the FileTypePolicies Chromium component.

This is needed for the download protection component of Safe Browsing.

chromium_src/chrome/browser/component_updater/file_type_policies_component_installer.cc

@@ -0,0 +1,29 @@
+/* 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 https://mozilla.org/MPL/2.0/. */
+
+#define RegisterFileTypePoliciesComponent \
+  RegisterFileTypePoliciesComponent_ChromiumImpl
+#include "../../../../../chrome/browser/component_updater/file_type_policies_component_installer.cc"  // NOLINT
+#undef RegisterFileTypePoliciesComponent
+
+#include "chrome/browser/component_updater/component_updater_utils.h"
+#include "components/component_updater/component_updater_service.h"
+
+namespace component_updater {
+
+const char kFileTypePoliciesComponentId[] = "khaoiebndkojlmppeemjhbpbandiljpe";
+
+void OnFileTypePoliciesRegistered() {
+  component_updater::BraveOnDemandUpdate(kFileTypePoliciesComponentId);
+}
+
+void RegisterFileTypePoliciesComponent(ComponentUpdateService* cus,
+                                       const base::FilePath& user_data_dir) {
+  auto installer = base::MakeRefCounted<ComponentInstaller>(
+      std::make_unique<FileTypePoliciesComponentInstallerPolicy>());
+  installer->Register(cus, base::Bind(&OnFileTypePoliciesRegistered));
+}
+
+}  // namespace component_updater