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

components/policy/resources/policy_templates.json

Index: components/policy/resources/policy_templates.json
diff --git a/components/policy/resources/policy_templates.json b/components/policy/resources/policy_templates.json
index f0070ed0c9bcd3ef71e6a55a89b6d933df13aea5..73f57ef465e22c0d09d1178894d2ab1580532686 100644
--- a/components/policy/resources/policy_templates.json
+++ b/components/policy/resources/policy_templates.json
@@ -137,7 +137,7 @@
 #   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: 345
+#   For your editing convenience: highest ID currently used: 348
 #
 # Placeholders:
 #   The following placeholder strings are automatically substituted:
@@ -8984,6 +8984,36 @@
       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.