Bug 1426710 - The telemetry on how often a backup connection wins should be histogram. r=mayhemer

netwerk/protocol/http/nsHttpConnectionMgr.cpp

@@ -4335,10 +4335,10 @@ nsHalfOpenSocket::OnOutputStreamReady(nsIAsyncOutputStream *out)
         // connection. We want to collect this telemetry only for cases where
         // TFO is not used.
         mBackupConnStatsSet = true;
-        Telemetry::ScalarSet(Telemetry::ScalarID::NETWORK_HTTP_BACKUP_CONN_WON,
-                             (out == mBackupStreamOut));
+        Telemetry::Accumulate(Telemetry::NETWORK_HTTP_BACKUP_CONN_WON_1,
+                              (out == mBackupStreamOut));
     }
-        
+
     nsresult rv =  SetupConn(out, false);
     if (mEnt) {
         mEnt->mDoNotDestroy = false;

toolkit/components/telemetry/Histograms.json

@@ -2441,6 +2441,14 @@
     "alert_emails": ["necko@mozilla.com", "ddamjanovic@mozilla.com"],
     "bug_numbers": [1390881]
   },
+  "NETWORK_HTTP_BACKUP_CONN_WON_1" : {
+    "record_in_processes": ["main"],
+    "expires_in_version": "61",
+    "kind": "boolean",
+    "description": "For connection where TFO has not be use, collect telemetry on whether the backup connection or the primary connection was faster.",
+    "alert_emails": ["necko@mozilla.com", "ddamjanovic@mozilla.com"],
+    "bug_numbers": [1426710]
+  },
   "TLS_EARLY_DATA_NEGOTIATED": {
     "record_in_processes": ["main", "content"],
     "expires_in_version": "62",

toolkit/components/telemetry/Scalars.yaml

@@ -1267,21 +1267,6 @@ screenshots:
     record_in_processes:
       - 'main'
 
-network.http:
-  backup_conn_won:
-    bug_numbers:
-      - 1402811
-    description: >
-      For connection where TFO has not be use, collect telemetry on whether the
-      backup connection or the primary connection was faster.
-    expires: "61"
-    kind: boolean
-    notification_emails:
-      - necko@mozilla.com
-      - ddamjanovic@mozilla.com
-    record_in_processes:
-      - 'main'
-
 idb.type:
   persistent_count:
     bug_numbers: