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 45f0d5fdffeef9e03b29c98c9f9f0b304812beaf..f29353000481056f8ff26e34988eda083c41f63b 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: 189
+#   For your editing convenience: highest ID currently used: 191
 #
 # Placeholders:
 #   The following placeholder strings are automatically substituted:
@@ -3527,6 +3527,46 @@
       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@localhost",

[bartfab (slow), 2013/02/28 10:21:33]

It seems you misunderstood my comment: The host part (example.com) was fine. We
will be using actual host names in reality. What I suggested you could change is
the local part, from bob@ to say public@. So I would suggest an example value of
public@example.com.

[dconnelly, 2013/02/28 12:52:56]

Done.

+      'id': 190,
+      'caption': '''Public session for auto-login''',
+      'desc': '''A public session to auto-login after a delay.
+
+      If this policy is set, the specified session will be automatically logged in after a period of time has elapsed at the login screen without user interaction. The public session must already be configured (see |DeviceLocalAccounts|).
+
+      If this policy is unset, there will be no auto-login.''',
+    },
+    {
+      'name': 'DeviceLocalAccountAutoLoginDelay',
+      'type': 'int',
+      'schema': { 'type': 'integer' },
+      'supported_on': ['chrome_os:26-'],
+      'device_only': True,
+      'features': {
+        'dynamic_refresh': True,
+      },
+      'example_value': 180000,
+      'id': 191,
+      'caption': '''Public session auto-login timer''',
+      'desc': '''The public session auto-login delay.
+
+      If the |DeviceLocalAccountAutoLoginId| policy is unset, this policy has no effect. Otherwise:
+
+      If this policy is set, it determines the amount of time without user activity that should elapse before automatically logging into the public session specified by the |DeviceLocalAccountAutoLoginId| policy.
+
+      If this policy is unset, 0 milliseconds will be used as the timeout.
+
+      This policy is specified in milliseconds.'''
+    },
+    {
       'name': 'BackgroundModeEnabled',
       'type': 'main',
       'schema': { 'type': 'boolean' },