MD Settings: Add dedicated C++ handler for restart/relaunch/powerwash.

chrome/browser/resources/settings/compiled_resources2.gyp

 # Copyright 2016 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 {
   'targets': [
     {
       'target_name': 'settings_resources',
       'type': 'none',
       'dependencies': [
         'about_page/compiled_resources2.gyp:*',
@@ skipping 20 matching lines @@
     },
     {
       'target_name': 'direction_delegate',
       'dependencies': [
         '<(DEPTH)/ui/webui/resources/js/compiled_resources2.gyp:assert',
         '<(DEPTH)/ui/webui/resources/js/compiled_resources2.gyp:cr',
         '<(DEPTH)/ui/webui/resources/js/compiled_resources2.gyp:load_time_data',
       ],
       'includes': ['../../../../third_party/closure_compiler/compile_js2.gypi'],
     },
+    {
+      'target_name': 'lifetime_browser_proxy',
+      'dependencies': [
+        '<(DEPTH)/ui/webui/resources/js/compiled_resources2.gyp:cr',
+        '<(EXTERNS_GYP):chrome_send',
+      ],
+      'includes': ['../../../../third_party/closure_compiler/compile_js2.gypi'],
+    },
   ],
 }