kiosk: Network connectivity test during launch.

chrome/browser/policy/proto/chromeos/chrome_device_policy.proto

 // 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.
 
 syntax = "proto2";
 
 option optimize_for = LITE_RUNTIME;
 
 package enterprise_management;
 
@@ skipping 295 matching lines @@
   // should be logged in automatically.  Should be equal to one of the
   // ids in DeviceLocalAccountInfoProto.
   optional string auto_login_id = 2;
 
   // The amount of time, in milliseconds, that should elapse at the signin
   // screen without user interaction before automatically logging in.
   optional int64 auto_login_delay = 3;
 
   // Whether the keyboard shortcut to prevent zero-delay auto-login should be
   // enabled or not. If this keyboard shortcut is engaged, the auto-login will
-  // be delayed by 3 minutes so administrators can log in or make configuration
+  // be delayed by 3 seconds so administrators can log in or make configuration
   // changes.
   optional bool enable_auto_login_bailout = 4 [default = true];
+
+  // Whether network configuration should be offered or not when the device
+  // does not have access to the Internet. If the policy is omitted or set to
+  // true, the network configuration will be offered. Otherwise, only an error
+  // message is displayed.
+  // Note: If both this policy and enable_auto_login_bailout policy above is
+  // set to false, there are chances that the device might become totally
+  // unusable when there is no Internet access and has to go through the
+  // recovery process.
+  optional bool prompt_for_network_when_offline = 5 [default = true];
 }
 
 message AllowRedeemChromeOsRegistrationOffersProto {
   // Chrome OS Registration service provides way for chromeos device users
   // to redeem electronic offers provided by service provider.
   // This value determines if users are allowed to redeem offers through
   // Chrome OS Registration service.
   optional bool allow_redeem_offers = 1 [default = true];
 }
 
@@ skipping 237 matching lines @@
   optional StartUpFlagsProto start_up_flags = 23;
   optional UptimeLimitProto uptime_limit = 24;
   optional VariationsParameterProto variations_parameter = 25;
   optional AttestationSettingsProto attestation_settings = 26;
   optional AccessibilitySettingsProto accessibility_settings = 27;
   optional SupervisedUsersSettingsProto supervised_users_settings = 28;
   optional LoginScreenPowerManagementProto login_screen_power_management = 29;
   optional SystemUse24HourClockProto use_24hour_clock = 30;
   optional AutoCleanupSettigsProto auto_clean_up_settings = 31;
 }