[Mac] Add option to reauthenticate the OS user before revealing passwords.

chrome/browser/about_flags.cc

 // 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.
 
 #include "chrome/browser/about_flags.h"
 
 #include <algorithm>
 #include <iterator>
 #include <map>
 #include <set>
@@ skipping 1238 matching lines @@
   },
   {
     "enable-password-generation",
     IDS_FLAGS_ENABLE_PASSWORD_GENERATION_NAME,
     IDS_FLAGS_ENABLE_PASSWORD_GENERATION_DESCRIPTION,
     kOsDesktop,
     ENABLE_DISABLE_VALUE_TYPE(autofill::switches::kEnablePasswordGeneration,
                               autofill::switches::kDisablePasswordGeneration)
   },
   {
+    "enable-password-manager-reauthentication",
+    IDS_FLAGS_PASSWORD_MANAGER_REAUTHENTICATION_NAME,
+    IDS_FLAGS_PASSWORD_MANAGER_REAUTHENTICATION_DESCRIPTION,
+    kOsMac,
+    SINGLE_VALUE_TYPE(switches::kEnablePasswordManagerReauthentication)
+  },
+  {
     "enable-people-search",
     IDS_FLAGS_ENABLE_PEOPLE_SEARCH_NAME,
     IDS_FLAGS_ENABLE_PEOPLE_SEARCH_DESCRIPTION,
     kOsMac | kOsWin | kOsCrOS,
     SINGLE_VALUE_TYPE(switches::kEnablePeopleSearch)
   },
   {
     "password-autofill-public-suffix-domain-matching",
     IDS_FLAGS_PASSWORD_AUTOFILL_PUBLIC_SUFFIX_DOMAIN_MATCHING_NAME,
     IDS_FLAGS_PASSWORD_AUTOFILL_PUBLIC_SUFFIX_DOMAIN_MATCHING_DESCRIPTION,
@@ skipping 1032 matching lines @@
 }
 
 const Experiment* GetExperiments(size_t* count) {
   *count = num_experiments;
   return experiments;
 }
 
 }  // namespace testing
 
 }  // namespace about_flags