cros: Added a new function to quick unlock api for checking unfinished pins.

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 119 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: 345
+#   For your editing convenience: highest ID currently used: 348
 #
 # 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 8826 matching lines @@
       },
       'example_value': True,
       'id': 342,
       'caption': '''Enables component updates in <ph name="PRODUCT_NAME">$1<ex>Google Chrome</ex></ph>.''',
       'tags': [],
       'desc': '''Enables component updates for all components in <ph name="PRODUCT_NAME">$1<ex>Google Chrome</ex></ph> when not set or set to True.
 
       If set to False, updates to components are disabled. However, some components are exempt from this policy: updates to any component that does not contain executable code, or does not significantly alter the behavior of the browser, or is critical for its security will not be disabled.
       Examples of such components include the certificate revocation lists and safe browsing data. ''',
     },
+    {
+      'name': 'PinUnlockMinimumLength',
+      'type': 'int',
+      'schema': { 'type': 'integer' },
+      'supported_on': ['chrome_os:55-'],
+      'features': {
+        'dynamic_refresh': False,
+        'per_profile': False,
+      },
+      'example_value': 4,
+      'id': 347,
+      'caption': '''Sets the minimum length of the lock screen pin.''',
+      'tags': [],
+      'desc': '''Pins created for the lock screen must have a length equal or greater than this value. ''',
+    },
+    {
+      'name': 'PinUnlockMaximumLength',
+      'type': 'int',
+      'schema': { 'type': 'integer' },
+      'supported_on': ['chrome_os:55-'],
+      'features': {
+        'dynamic_refresh': False,
+        'per_profile': False,
+      },
+      'example_value': 0,
+      'id': 348,
+      'caption': '''Sets the maximum length of the lock screen pin.''',
+      'tags': [],
+      'desc': '''Pins created for the lock screen must have a length equal or lesser than this value. If this value is 0, or is less than PinUnlockMinimumLength, pins will have no maximum. ''',
+    },
   ],
   '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': [],
 }