Add a lock to the managed user settings page and require authentication for unlocking.

chrome/common/pref_names.cc

Index: chrome/common/pref_names.cc
diff --git a/chrome/common/pref_names.cc b/chrome/common/pref_names.cc
index fb670a86030e71f466bc3614642b8b6f1b38f264..5bed109009f30d4079923a2b8e030c64a104c8e6 100644
--- a/chrome/common/pref_names.cc
+++ b/chrome/common/pref_names.cc
@@ -842,6 +842,9 @@ const char kDeauthorizeContentLicenses[] =
     "browser.clear_data.content_licenses";
 const char kDeleteTimePeriod[] = "browser.clear_data.time_period";
 
+// A boolean pref controlling the use of a password to lock chrome
+const char kChildLockDisabled[] = "child.locking_disabled";
+
 // Boolean pref to define the default values for using spellchecker.
 const char kEnableContinuousSpellcheck[] = "browser.enable_spellchecking";
 
@@ -2069,6 +2072,8 @@ const char kManagedNotificationsBlockedForUrls[] =
 const char kManagedAutoSelectCertificateForUrls[] =
     "profile.managed_auto_select_certificate_for_urls";
 
+const char kManagedModeLocalPassphrase[] = "managed_mode.passphrase";
+
 // Set to true if the user created a login item so we should not modify it when
 // uninstalling background apps.
 const char kUserCreatedLoginItem[] = "background_mode.user_created_login_item";