Persist setup metrics and have Chrome report them during UMA upload.

chrome/chrome_installer.gypi

 # Copyright (c) 2012 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.
 
 {
   'variables': {
     'lastchange_path': '../build/util/LASTCHANGE',
     'branding_dir': 'app/theme/<(branding_path_component)',
     'branding_dir_100': 'app/theme/default_100_percent/<(branding_path_component)',
   },
@@ skipping 221 matching lines @@
             'installer/setup/archive_patch_helper.cc',
             'installer/setup/archive_patch_helper.h',
             'installer/setup/install.cc',
             'installer/setup/install.h',
             'installer/setup/install_worker.cc',
             'installer/setup/install_worker.h',
             'installer/setup/installer_crash_reporter_client.cc',
             'installer/setup/installer_crash_reporter_client.h',
             'installer/setup/installer_crash_reporting.cc',
             'installer/setup/installer_crash_reporting.h',
+            'installer/setup/installer_metrics.cc',
+            'installer/setup/installer_metrics.h',
             'installer/setup/setup_constants.cc',
             'installer/setup/setup_constants.h',
             'installer/setup/setup_util.cc',
             'installer/setup/setup_util.h',
             'installer/setup/update_active_setup_version_work_item.cc',
             'installer/setup/update_active_setup_version_work_item.h',
           ],
         },
         {
           # GN version: //chrome/installer/setup
@@ skipping 868 matching lines @@
             '../build/isolate.gypi',
           ],
           'sources': [
             'setup_unittests.isolate',
           ],
         },
       ],
     }],
   ],
 }