Implement a policy to autologin a public account.

chrome/browser/policy/proto/chrome_device_policy.proto

Index: chrome/browser/policy/proto/chrome_device_policy.proto
diff --git a/chrome/browser/policy/proto/chrome_device_policy.proto b/chrome/browser/policy/proto/chrome_device_policy.proto
index 2ed793354d189fbae08b22e133599a77ec49abdc..a79580ea64b482546052bf42663713f58235c154 100644
--- a/chrome/browser/policy/proto/chrome_device_policy.proto
+++ b/chrome/browser/policy/proto/chrome_device_policy.proto
@@ -235,6 +235,15 @@ message DeviceLocalAccountsProto {
   // The list of device-local accounts (i.e. accounts without an associated
   // cloud-backed profile) that are available on the device.
   repeated DeviceLocalAccountInfoProto account = 1;
+
+  // The identifier of the device-local account to which the device
+  // 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;
 }
 
 message AllowRedeemChromeOsRegistrationOffersProto {
@@ -251,6 +260,16 @@ message StartUpFlagsProto {
   repeated string flags = 1;
 }
 
+message DeviceLocalAccountAutoLoginProto {

[Mattias Nissler (ping if slow), 2013/03/12 10:08:01]

This no longer used, please remove.

[dconnelly, 2013/03/12 10:43:31]

Ugh, came back in during rebase :(
Done.

+  // The identifier of the device-local account to which the device
+  // should be logged in automatically.
+  optional string id = 1;
+
+  // The amount of time that should elapse at the signin screen before
+  // automatically logging in.
+  optional int64 delay = 2;
+}
+
 message ChromeDeviceSettingsProto {
   optional DevicePolicyRefreshRateProto device_policy_refresh_rate = 1;
   optional UserWhitelistProto user_whitelist = 2;
@@ -275,4 +294,5 @@ message ChromeDeviceSettingsProto {
   optional DeviceLocalAccountsProto device_local_accounts = 21;
   optional AllowRedeemChromeOsRegistrationOffersProto allow_redeem_offers = 22;
   optional StartUpFlagsProto start_up_flags = 23;
+  optional DeviceLocalAccountAutoLoginProto device_local_account_auto_login = 24;
 }