Implement a policy to autologin a public account.

chrome/browser/chromeos/settings/device_settings_provider.cc

Index: chrome/browser/chromeos/settings/device_settings_provider.cc
diff --git a/chrome/browser/chromeos/settings/device_settings_provider.cc b/chrome/browser/chromeos/settings/device_settings_provider.cc
index f60f5445fc60662b41b5d35e859f25362091d5d2..e9c5b71883604be1ac6b294b705124d9eaadad63 100644
--- a/chrome/browser/chromeos/settings/device_settings_provider.cc
+++ b/chrome/browser/chromeos/settings/device_settings_provider.cc
@@ -44,6 +44,8 @@ const char* kKnownSettings[] = {
   kAccountsPrefShowUserNamesOnSignIn,
   kAccountsPrefUsers,
   kAccountsPrefDeviceLocalAccounts,
+  kAccountsPrefDeviceLocalAccountAutoLoginUsername,
+  kAccountsPrefDeviceLocalAccountAutoLoginTimerMillis,
   kAppPack,
   kDeviceOwner,
   kIdleLogoutTimeout,
@@ -232,6 +234,22 @@ void DeviceSettingsProvider::SetInPolicy() {
     } else {
       NOTREACHED();
     }
+  } else if (prop == kAccountsPrefDeviceLocalAccountAutoLoginUsername) {
+    em::DeviceLocalAccountAutoLoginProto* auto_login =
+      device_settings_.mutable_device_local_account_auto_login();
+    std::string id;
+    if (value->GetAsString(&id))
+      auto_login->set_id(id);
+    else
+      NOTREACHED();
+  } else if (prop == kAccountsPrefDeviceLocalAccountAutoLoginTimerMillis) {
+    em::DeviceLocalAccountAutoLoginProto* auto_login =
+      device_settings_.mutable_device_local_account_auto_login();
+    int timer;
+    if (value->GetAsInteger(&timer))
+      auto_login->set_timer_millis(timer);
+    else
+      NOTREACHED();
   } else if (prop == kSignedDataRoamingEnabled) {
     em::DataRoamingEnabledProto* roam =
         device_settings_.mutable_data_roaming_enabled();
@@ -395,6 +413,19 @@ void DeviceSettingsProvider::DecodeLoginPolicies(
     }
   }
   new_values_cache->SetValue(kAccountsPrefDeviceLocalAccounts, account_list);
+
+  if (policy.has_device_local_account_auto_login()) {
+    if (policy.device_local_account_auto_login().has_id()) {
+      new_values_cache->SetString(
+          kAccountsPrefDeviceLocalAccountAutoLoginUsername,
+          policy.device_local_account_auto_login().id());
+    }
+    if (policy.device_local_account_auto_login().has_timer_millis()) {
+      new_values_cache->SetInteger(
+          kAccountsPrefDeviceLocalAccountAutoLoginTimerMillis,
+          policy.device_local_account_auto_login().timer_millis());
+    }
+  }
 }
 
 void DeviceSettingsProvider::DecodeKioskPolicies(