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 0e9863e2cd612f655f584d62731bddb6937b93f2..014764740cdfc32bb806b4c04466882f513655d7 100644
--- a/chrome/browser/policy/proto/chrome_device_policy.proto
+++ b/chrome/browser/policy/proto/chrome_device_policy.proto
@@ -237,6 +237,16 @@ message DeviceLocalAccountsProto {
   repeated DeviceLocalAccountInfoProto account = 1;
 }
 
+message DeviceLocalAccountAutoLoginProto {

[Mattias Nissler (ping if slow), 2013/02/11 09:46:02]

The design doc originally proposed to put the fields below into
DeviceLocalAccountsProto. That'd also be more in line with
DeviceAutoUpdateSettingsProto above, any reason to have a separate message type?

[dconnelly, 2013/02/11 16:17:56]

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;
@@ -259,4 +269,6 @@ message ChromeDeviceSettingsProto {
   optional PinnedAppsProto pinned_apps = 19;
   optional SystemTimezoneProto system_timezone = 20;
   optional DeviceLocalAccountsProto device_local_accounts = 21;
+  optional DeviceLocalAccountAutoLoginProto device_local_account_auto_login =
+      22;
 }