Implement a policy to autologin a public account.

chrome/app/policy/policy_templates.json

Index: chrome/app/policy/policy_templates.json
diff --git a/chrome/app/policy/policy_templates.json b/chrome/app/policy/policy_templates.json
index 3f3f44dc299c1b9f274a60453e08ce0fb6523aae..0a5510384e01d8d6ac83a2617ed3d01844dfaef2 100644
--- a/chrome/app/policy/policy_templates.json
+++ b/chrome/app/policy/policy_templates.json
@@ -112,7 +112,7 @@
 #   persistent IDs for all fields (but not for groups!) are needed. These are
 #   specified by the 'id' keys of each policy. NEVER CHANGE EXISTING IDs,
 #   because doing so would break the deployed wire format!
-#   For your editing convenience: highest ID currently used: 171
+#   For your editing convenience: highest ID currently used: 173

[bartfab (slow), 2013/02/11 09:46:01]

Nit: Rebase. You are ~15 policies out of date :).

 #
 # Placeholders:
 #   The following placeholder strings are automatically substituted:
@@ -3502,6 +3502,34 @@
       Every list entry specifies an identifier, which is used internally to tell the different device-local accounts apart.''',
     },
     {
+      'name': 'DeviceLocalAccountAutoLoginId',
+      'type': 'string',
+      'schema': { 'type': 'string' },
+      'supported_on': ['chrome_os:26-'],
+      'device_only': True,
+      'features': {
+        'dynamic_refresh': True,
+      },
+      'example_value': "bob@example.com",
+      'id': 172,
+      'caption': '''Public session for auto-login''',
+      'desc': '''A public session that should be automatically logged in after a period of time has elapsed at the login screen.  The public session must already be configured (see "DeviceLocalAccounts").''',

[bartfab (slow), 2013/02/11 09:46:01]

Nit: I don't think we have been using the ancient typewriter convention of two
spaces after a full stop in this file.

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

Done.

+    },
+    {
+      'name': 'DeviceLocalAccountAutoLoginDelay',
+      'type': 'int',
+      'schema': { 'type': 'integer' },
+      'supported_on': ['chrome_os:26-'],
+      'device_only': True,
+      'features': {
+        'dynamic_refresh': True,
+      },
+      'example_value': 300,
+      'id': 173,
+      'caption': '''Public session auto-login timer''',
+      'desc': '''The amount of time (in milliseconds) that should elapse before automatically logging in a public session (see the "DeviceLocalAccountAutoLoginId" policy).  If this policy isn't specified, 0 milliseconds will be used as the timeout.''',

[bartfab (slow), 2013/02/11 09:46:01]

Nit: We normally tend to have this format for the description (no idea whether
it's random custom or actually useful to stick to):

'''1-line description

If this policy is set, [...]

If this policy is unset, [...]

This policy is specified in milliseconds.'''

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

Done.

+    },
+    {
       'name': 'BackgroundModeEnabled',
       'type': 'main',
       'schema': { 'type': 'boolean' },