ChromeOS: Add SystemTimezoneAutomaticDetection policy.

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 2eb824f8e2ef75652906ab1d40f8ab87c81e54f2..1403c5700418566ef6f6c9f5455eb0ef077139ab 100644
--- a/components/policy/resources/policy_templates.json
+++ b/components/policy/resources/policy_templates.json
@@ -5737,7 +5737,9 @@
 
       New devices start out with the timezone set to "US/Pacific".
 
-      The format of the value follows the names of timezones in the "IANA Time Zone Database" (see "https://en.wikipedia.org/wiki/Tz_database"). In particular, most timezones can be referred to by "continent/large_city" or "ocean/large_city".''',
+      The format of the value follows the names of timezones in the "IANA Time Zone Database" (see "https://en.wikipedia.org/wiki/Tz_database"). In particular, most timezones can be referred to by "continent/large_city" or "ocean/large_city".
+
+      Setting this policy completely disables automatic timezone resolve by device location. It also overrides SystemTimezoneAutomaticDetection policy.''',
     },
     {
       'name': 'SystemUse24HourClock',
@@ -8374,6 +8376,58 @@
       'tags': ['system-security'],
       'id': 324,
     },
+    {
+      'name': 'SystemTimezoneAutomaticDetection',
+      'type': 'int-enum',
+      'schema': {
+        'type': 'integer',
+        'enum': [ 0, 1, 2, 3 ],
+      },
+      'items': [
+        {
+          'name': 'AUTOMATIC_TIMEZONE_DETECTION_USERS_DECIDE',
+          'value': 0,
+          'caption': '''Let users decide.''',
+        },
+        {
+          'name': 'AUTOMATIC_TIMEZONE_DETECTION_DISABLED',
+          'value': 1,
+          'caption': '''Never auto-detect timezone.''',
+        },
+        {
+          'name': 'AUTOMATIC_TIMEZONE_DETECTION_IP_ONLY',
+          'value': 2,
+          'caption': '''Always use coarse timezone detection.''',
+        },
+        {
+          'name': 'AUTOMATIC_TIMEZONE_DETECTION_SEND_WIFI_ACCESS_POINTS',
+          'value': 3,
+          'caption': '''Always send WiFi acess-points to server.use fine-grained timezone detection (send curently visible WiFi access points to Geolocation API to better locate geographical position).''',
+        },
+      ],
+      'supported_on': ['chrome_os:51-'],
+      'device_only': True,
+      'features': {
+        'dynamic_refresh': True,
+      },
+      'example_value': 0,
+      'id': 325,
+      'caption': '''Configure the automatic timezone detection method''',
+      'tags': [],
+      'desc': '''When this policy is set, automatic timezone detection flow will be in one of the following ways depending on the value of the setting:
+
+      If set to AUTOMATIC_TIMEZONE_DETECTION_USERS_DECIDE, users would be able to control automatic timezone detection using normal controls in chrome://settings.
+
+      If set to AUTOMATIC_TIMEZONE_DETECTION_DISABLED, automatic timezone controls in chrome://settings will be disabled. Automatic timezone detection will be always off. Timezone could be controlled either by SystemTimezone policy or by timezone selector in chrome://settings.
+
+      If set to AUTOMATIC_TIMEZONE_DETECTION_IP_ONLY, timezone controls in chrome://settings will be disabled. Automatic timezone detection will be always on. Timezone detection will use IP-only method to resolve location.
+
+      If set to AUTOMATIC_TIMEZONE_DETECTION_SEND_WIFI_ACCESS_POINTS, timezone controls in chrome://settings will be disabled. Automatic timezone detection will be always on. The list of visible WiFi access-points will be always sent to Geolocation API server for fine-grained timezone detection.
+
+      If this policy is not set, it will behave as if AUTOMATIC_TIMEZONE_DETECTION_USERS_DECIDE is set.
+
+      If SystemTimezone policy is set. it overrides this policy. In this case automatic timezone detection is completely disabled.''',
+    },
   ],
   'messages': {
     # Messages that are not associated to any policies.