Add support for cellular geolocation

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 d3881ca2809cafb8beb2bef920a4fa02a86c3e22..1cb79bc5686e0f7a970bd4cf392129cd66ae2b77 100644
--- a/components/policy/resources/policy_templates.json
+++ b/components/policy/resources/policy_templates.json
@@ -8832,7 +8832,12 @@
         {
           'name': 'TimezoneAutomaticDetectionSendWiFiAccessPoints',
           'value': 3,
-          'caption': '''Always send WiFi acess-points to server while resolving timezone.''',
+          'caption': '''Always send WiFi access-points to server while resolving timezone.''',
+        },
+        {
+          'name': 'TimezoneAutomaticDetectionSendAllNetworkInfo',
+          'value': 4,
+          'caption': '''Always send any available location signals to the server while resolving timezone.''',
         },
       ],
       'supported_on': ['chrome_os:53-'],
@@ -8854,6 +8859,8 @@
 
       If set to TimezoneAutomaticDetectionSendWiFiAccessPoints, 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 set to TimezoneAutomaticDetectionSendAllNetworkInfo, timezone controls in chrome://settings will be disabled. Automatic timezone detection will be always on. Network information (including visible WiFi access-points, reachable Cell Towers, and any other available information) will be sent to a Geolocation API server for fine-grained timezone detection.
+
       If this policy is not set, it will behave as if TimezoneAutomaticDetectionUsersDecide is set.
 
       If SystemTimezone policy is set, it overrides this policy. In this case automatic timezone detection is completely disabled.''',