Implement a policy to autologin a public account.

chrome/app/policy/policy_templates.json

 {
 # policy_templates.json - Metafile for policy templates
 #
 # The content of this file is evaluated as a Python expression.
 #
 # This file is used as input to generate the following policy templates:
 # ADM, ADMX+ADML, MCX/plist and html documentation.
 #
 # Policy templates are user interface definitions or documents about the
 # policies that can be used to configure Chrome. Each policy is a name-value
@@ skipping 94 matching lines @@
 #   templates and documentation. The policy definition list that Chrome sees
 #   will include policies marked with 'future'. If a WIP policy isn't meant to
 #   be seen by the policy providers either, the 'supported_on' key should be set
 #   to an empty list.
 #
 # IDs:
 #   Since a Protocol Buffer definition is generated from this file, unique and
 #   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 You are ~15 policies out of date :).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:
 #     $1 -> Google Chrome / Chromium
 #     $2 -> Google Chrome OS / Chromium OS
 #     $3 -> Google Chrome Frame / Chromium Frame
 #     $6 is reserved for doc_writer
 #
 # Device Policy:
 #   An additional flag device_only (optional, defaults to False) indicates
@@ skipping 3369 matching lines @@
         'dynamic_refresh': True,
       },
       'example_value': [ "demo@example.com" ],
       'id': 163,
       'caption': '''Device-local accounts''',
       'desc': '''Specifies the list of device-local accounts to be shown on the login screen.
 
       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' },
       'supported_on': ['chrome.win:19-', 'chrome.linux:19-'],
       'features': {
         'can_be_recommended': True,
         'dynamic_refresh': True,
         'per_profile': False,
       },
       'example_value': True,
@@ skipping 456 matching lines @@
       'desc': '''Text appended in parentheses to the policy name to indicate that it has been deprecated''',
       'text': 'deprecated',
     },
     'doc_recommended': {
       'desc': '''Text appended in parentheses next to the policies top-level container to indicate that those policies are of the Recommended level''',
       'text': 'Default Settings (users can override)',
     },
   },
   'placeholders': [],
 }