Bug 1664461 - Send an hourly 'fog-validation' ping r=janerik

Depends on D92470

Differential Revision: https://phabricator.services.mozilla.com/D92471

toolkit/components/glean/pings.yaml

@@ -11,3 +11,19 @@
 
 ---
 $schema: moz://mozilla.org/schemas/glean/pings/1-0-0
+
+fog-validation:
+  description: |
+    This ping is intended to evaluate the behaviour of FOG before
+    it ships beyond Nightly.
+    This is a temporary ping.
+    It is sent one hour after FOG is initialized, and every hour thereafter.
+  include_client_id: true
+  send_if_empty: true
+  bugs:
+    - https://bugzilla.mozilla.org/1664461
+  data_reviews:
+    - https://bugzilla.mozilla.org/show_bug.cgi?id=1664461
+  notification_emails:
+    - chutten@mozilla.com
+    - glean-team@mozilla.com

toolkit/components/glean/src/lib.rs

@@ -125,6 +125,7 @@ pub unsafe extern "C" fn fog_init() -> nsresult {
             }
 
             fog::metrics::fog::initialization.stop();
+            schedule_fog_validation_ping();
         });
     }
 
@@ -359,3 +360,13 @@ pub unsafe extern "C" fn fog_set_log_pings(value: bool) -> nsresult {
         return NS_ERROR_FAILURE;
     }
 }
+
+fn schedule_fog_validation_ping() {
+    std::thread::spawn(|| {
+        loop {
+            // Sleep for an hour before and between submissions.
+            std::thread::sleep(std::time::Duration::from_secs(60 * 60));
+            fog::pings::fog_validation.submit(None);
+        }
+    });
+}