Add device policy definition for local accounts.

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: 161
+#   For your editing convenience: highest ID currently used: 162
 #
 # 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 2909 matching lines @@
       'device_only': True,
       'features': {'dynamic_refresh': True},
       'example_value': [ 'ethernet' ],
       'id': 146,
       'caption': '''Connection types allowed for updates''',
       'desc': ''' The types of connections that are allowed to use for OS updates. OS updates potentially put heavy strain on the connection due to their size and may incur additional cost. Therefore, they are by default not enabled for connection types that are considered expensive, which include WiMax, Bluetooth and Cellular at the moment.
 
       The recognized connection type identifiers are "ethernet", "wifi", "wimax", "bluetooth" and "cellular".''',
     },
     {
+      # TODO(joaodasilva): Make this the default and deprecate the other proxy

[pastarmovj, 2012/11/06 12:42:15]

proxy policies?

[Mattias Nissler (ping if slow), 2012/11/12 15:50:51]

Done.

+      # policies once all providers are ready to load 'dict' policies.
+      # This is currently an internal policy.
+      # http://crbug.com/108992, http://crbug.com/108996
+      'name': 'DeviceLocalAccounts',

[Bin, 2012/11/07 19:17:04]

What's this for? I assume it is a device-level policy. But that's are defined in
chrome_device_policy.proto

[Mattias Nissler (ping if slow), 2012/11/12 15:50:51]

This is just for allocating a policy constant (which is necessary to have stuff
show up in about:policy).

+      'type': 'list',
+      'schema': {
+        'type': 'array',
+        'items': {
+          'type': 'object',
+          'properties': {
+            'Id': { 'type': 'string' },
+            'Name': { 'type': 'string' },
+          },
+        },
+      },
+      'supported_on': ['chrome_os:0.25-'],
+      'future': True,
+      'features': {'dynamic_refresh': True},
+      'example_value': [ { "Id": "demo@example.com", "Name": "Demo session" } ],
+      'id': 162,
+      'caption': '''Local accounts''',
+      'desc': '''Specifies the list of local accounts to be shown on the login screen.
+
+      Every list entry gives an identifier, which is used internally to tell the different local accounts apart, and a display name that will be used to show the local account on the login screen.''',
+    },
+    {
       'name': 'BackgroundModeEnabled',
       'type': 'main',
       'schema': { 'type': 'boolean' },
       'supported_on': ['chrome.win:19-', 'chrome.linux:19-'],
       'features': {
         'dynamic_refresh': True,
         'can_be_recommended': True,
       },
       'example_value': True,
       'id': 138,
@@ skipping 284 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': 'Recommended',
     },
   },
   'placeholders': [],
 }