Policy to control ARC Backup&Restore.

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: 336
+#   For your editing convenience: highest ID currently used: 337
 #
 # 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 8585 matching lines @@
       'features': {
         'dynamic_refresh': False,
         'per_profile': True,
       },
       'example_value': True,
       'id': 333,
       'caption': '''Enables cast''',
       'tags': [],
       'desc': '''If this is set to true or is not set, users will be able to cast tabs, sites or the desktop from the browser. If set to false, this option will be disabled.'''
     },
+    {
+      'name': 'ArcBackupRestoreEnabled',
+      'type': 'main',
+      'schema': { 'type': 'boolean' },
+      'supported_on': ['chrome_os:53-'],
+      'features': {
+        'dynamic_refresh': True,
+        'per_profile': False,
+      },
+      'example_value': False,
+      'id': 337,
+      'default_for_enterprise_users': False,
+      'caption': '''Enable Backup and Restore for ARC''',

[Thiemo Nagel, 2016/07/12 15:02:40]

From our docs, it seems to me that Android Backup Service is the official name
of this feature.  If this is correct, please change the name of the policy and
update the documentation.

https://support.google.com/nexus/answer/2819582?hl=en

[Sergey Poromov, 2016/07/12 16:18:11]

Done. Also changed histograms.xml

+      'tags': [],
+      'desc':
+      '''When this policy is set to True, ARC app data will be uploaded

[Thiemo Nagel, 2016/07/12 15:02:40]

s/True/true

Nit: I'd suggest to use present tense as that is better style.

[Sergey Poromov, 2016/07/12 16:18:12]

Done.

+      to Android Backup servers and restored from them upon app installations.

[Thiemo Nagel, 2016/07/12 15:02:40]

Maybe replacing "installations" by "re-installation" makes things clearer?

[Sergey Poromov, 2016/07/12 16:18:11]

Done.

+
+      If this setting is configured then users are not able change it themselves.
+
+      If this setting is not configured then users are able to turn Backup
+      and Restore on and off in Android Settings app.''',
+    },
   ],
   '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 109 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': [],
 }