Add gnubby authentication to remoting host

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 100 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: 256
+#   For your editing convenience: highest ID currently used: 257
 #
 # 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 484 matching lines @@
             'dynamic_refresh': True,
             'per_profile': False,
           },
           'example_value': False,
           'id': 234,
           'caption': '''Enable or disable PIN-less authentication''',
           'desc': '''If this setting is enabled or not configured, then users can opt to pair clients and hosts at connection time, eliminating the need to enter a PIN every time.
 
           If this setting is disabled, then this feature will not be available.''',
         },
+        {
+          'name': 'RemoteAccessHostAllowGnubbyAuth',
+          'type': 'main',
+          'schema': { 'type': 'boolean' },
+          'supported_on': ['chrome.*:35-'],
+          'features': {
+            'dynamic_refresh': True,
+            'per_profile': False,
+          },
+          'example_value': True,
+          'id': 257,
+          'caption': '''Allow gnubby authentication''',
+          'desc': '''If this setting is enabled, then gnubby authentication requests will be proxied across a remote host connection.
+
+          If this setting is disabled or not configured, gnubby authentication requests will not be proxied.''',
+        },
       ],
     },
     {
       'name': 'PrintingEnabled',
       'type': 'main',
       'schema': { 'type': 'boolean' },
       'supported_on': ['chrome.*:8-', 'chrome_os:11-'],
       'features': {
         'dynamic_refresh': True,
         'per_profile': True,
@@ skipping 5551 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': [],
 }