cros: Added policies for screen unlock.

components/policy/resources/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 121 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: 349
+#   For your editing convenience: highest ID currently used: 351
 #
 # 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 8991 matching lines @@
       name="PRINTER_UUID">uuid</ph> is optional.  If provided, it is used to
       help deduplicate <ph name="ZEROCONF_DISCOVERY">zeroconf</ph> printers.
 
       Printer setup is completed upon the first use of a printer.  PPDs are not
       downloaded until the printer is used.  After that time, frequently used
       PPDs are cached.
 
       This policy has no effect on whether users can configure printers on
       individual devices.  It is intended to be supplementary to the
       configuration of printers by individual users.''',
-    }
+    },
+    {
+      'name': 'QuickUnlockModeWhitelist',
+      'type': 'list',
+      'schema': {
+        'type': 'array',

[pastarmovj, 2016/11/04 10:33:03]

Please consult the "ExtensionAllowedTypes" policy to see how to document the
possible values for a string enum.

Also in the description section write the possible values and what do they mean.
Also describe the default behavior when the policy is not set.

[sammiequon, 2016/11/06 17:52:52]

Done.

+        'items': { 'type': 'string' },
+      },
+      'supported_on': ['chrome_os:56-'],
+      'features': {
+        'dynamic_refresh': True,
+        'per_profile': True,
+      },
+      'example_value': ['PIN'],
+      'id': 351,
+      'caption': '''Enable methods for unlocking the lock screen.''',
+      'tags': [],
+      'desc': '''This policy sets which methods can be used to unlock the lock screen. All means all available methods can be used, otherwise only the specified chosen methods may be used.''',
+    },
+    {
+      'name': 'QuickUnlockTimeout',
+      'type': 'int-enum',
+      'schema': {
+        'type': 'integer',
+        'enum': [ 0, 1, 2, 3 ],
+      },
+      'items': [
+        {
+          'name': 'SixHours',
+          'value': 0,
+          'caption': '''Password entry is required every six hours.''',
+        },
+        {
+          'name': 'TweleveHours',
+          'value': 1,
+          'caption': '''Password entry is required every twelve hours.''',
+        },
+        {
+          'name': 'Day',
+          'value': 2,
+          'caption': '''Password entry is required every day (24 hours).''',
+        },
+        {
+          'name': 'Week',
+          'value': 3,
+          'caption': '''Password entry is required every week (168 hours).''',
+        },
+      ],
+      'supported_on': ['chrome_os:56-'],
+      'features': {
+        'dynamic_refresh': True,
+        'per_profile': True,
+      },
+      'example_value': 2,
+      'id': 352,
+      'caption': '''Sets how often user has to enter password to use quick unlock.''',
+      'tags': [],
+      'desc': '''Users have to enter their password into the lock screen every once in a while to continue using quick unlock. This policy sents the interval at which the lock screen will request the users password.''',

[pastarmovj, 2016/11/04 10:33:03]

Again document the default behavior here.

[battre, 2016/11/04 10:59:36]

This description is unclear to me. Let's say I pick 6 hours. Does that mean that
I have to enter the password (as opposed to quick unlock)
- if the Chromebook showed a lock screen for 6 hours? 
- if the last quick unlock has been 6 hours ago, but I used the Chromebook
during that time?
- if the last password has been entered 6 hours ago, but I used the Chromebook
during that time?

[sammiequon, 2016/11/06 17:52:52]

Done.

[sammiequon, 2016/11/06 17:52:52]

Done.

+    },
   ],
   'messages': {
     # Messages that are not associated to any policies.
     'win_supported_winxpsp2': {
       'desc': '''A label specifying the oldest possible compatible version of Windows. This text will appear right next to a label containing the text 'Supported on:'.''',
       'text': '''Microsoft Windows XP SP2 or later'''
     },
     'mac_chrome_preferences': {
       'desc': '''A text indicating in Mac OS X Workgroup Manager, that currently the preferences of Chromium are being edited''',
       'text': '''<ph name="PRODUCT_NAME">$1<ex>Google Chrome</ex></ph> preferences'''
@@ skipping 113 matching lines @@
       '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)',
     },
     'doc_complex_policies_on_windows': {
       'desc': '''Text pointing the user to a help article for complex policies on Windows''',
       'text': '''encoded as a JSON string, for details see <ph name="COMPLEX_POLICIES_URL">https://www.chromium.org/administrators/complex-policies-on-windows<ex>https://www.chromium.org/administrators/complex-policies-on-windows</ex></ph>''',
     },
   },
   'placeholders': [],
 }