Bug 1529016 - P1 - Collect unexpected file's name in the origin directories; r=asuth,chutten

Differential Revision: https://phabricator.services.mozilla.com/D34721

--HG--
extra : moz-landing-system : lando

dom/quota/ActorsParent.cpp

@@ -4259,6 +4259,13 @@ nsresult QuotaManager::InitializeOrigin(PersistenceType aPersistenceType,
 
       UNKNOWN_FILE_WARNING(leafName);
       REPORT_TELEMETRY_INIT_ERR(kInternalError, Ori_UnexpectedFile);
+
+#ifdef NIGHTLY_BUILD
+      Telemetry::ScalarSetMaximum(
+          Telemetry::ScalarID::QM_ORIGIN_DIRECTORY_UNEXPECTED_FILENAME,
+          leafName, 1);
+#endif
+
       RECORD_IN_NIGHTLY(statusKeeper, NS_ERROR_UNEXPECTED);
       CONTINUE_IN_NIGHTLY_RETURN_IN_OTHERS(NS_ERROR_UNEXPECTED);
     }

toolkit/components/telemetry/Scalars.yaml

@@ -3777,6 +3777,21 @@ networking:
     record_in_processes:
       - 'main'
 
+# The following section is for quotaManager
+qm:
+  origin_directory_unexpected_filename:
+    bug_numbers:
+      - 1529016
+    description: >
+      Keys are the filenames of unexpected files in the profile's origin directories.
+    expires: "70"
+    keyed: true
+    kind: uint
+    notification_emails:
+      - ttung@mozilla.com
+    record_in_processes:
+      - 'main'
+
 # The following section is for probes testing the Telemetry system. They will not be
 # submitted in pings and are only used for testing.
 telemetry.test: