Add sound volume to device attribute reporting

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: 366
+#   For your editing convenience: highest ID currently used: 367
 #   And don't forget to also update the EnterprisePolicies enum of
 #   histograms.xml (run tools/metrics/histograms/update_policies.py).
 #
 # 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
 #
@@ skipping 9457 matching lines @@
       },
       'example_value': [ "xkb:us::en", "xkb:ch::ger" ],
       'max_size': 16777216,
       'id': 365,
       'caption': '''Device sign-in screen keyboard layouts''',
       'tags': [],
       'desc': '''Configures which keyboard layouts are allowed on the <ph name="PRODUCT_OS_NAME">$2<ex>Google Chrome OS</ex></ph> sign-in screen.
 
       If this policy is set to a list of input method identifiers, the given input methods will be available on the sign-in screen. The first given input method will be preselected. While a user pod is focused on the sign-in screen, the user's last used input method will be available in addition to the input methods given by this policy. If this policy is not set, the input methods on the sign-in screen will be derived from the locale in which the sign-in screen is displayed. Values which are not valid input method identifiers will be ignored.''',
     },
+    {
+      'name': 'ReportSoundVolume',
+      'type': 'main',
+      'schema': { 'type': 'boolean' },
+      'supported_on': ['chrome_os:58-'],
+      'device_only': True,
+      'features': {
+        'dynamic_refresh': True,
+      },
+      'example_value': False,
+      'id': 367,
+      'caption': '''Report sound volume''',
+      'tags': ['admin-sharing'],
+      'desc': '''Report current sound volume of the device.
+
+      If the policy is set to false, the statistics will not be reported.
+      If set to true or left unset, statistics will be reported.''',
+      'arc_support': 'This policy has no effect on the logging done by Android.',
+    },
   ],
   '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': [],
 }