Bug 1416629: Add a telemetry to get how many precentage of synthesized cors response for same-origin mode request. r=bkelly, data-r=francois

--HG--
extra : rebase_source : af6c7186f7b4c08fd94f5613d8bfe67666903c6e

dom/workers/ServiceWorkerEvents.cpp

@@ -669,6 +669,13 @@ RespondWithHandler::ResolvedCallback(JSContext* aCx, JS::Handle<JS::Value> aValu
     }
   }
 
+  Telemetry::ScalarAdd(Telemetry::ScalarID::SW_SYNTHESIZED_RES_COUNT, 1);
+
+  if (mRequestMode == RequestMode::Same_origin &&
+      response->Type() == ResponseType::Cors) {
+    Telemetry::ScalarAdd(Telemetry::ScalarID::SW_CORS_RES_FOR_SO_REQ_COUNT, 1);
+  }
+
   UniquePtr<RespondWithClosure> closure(new RespondWithClosure(mInterceptedChannel,
                                                                mRegistration,
                                                                mRequestURL,

toolkit/components/telemetry/Scalars.yaml

@@ -1358,6 +1358,39 @@ timestamps:
     record_in_processes:
       - main
 
+# The following section contains the service worker scalars.
+sw:
+  synthesized_res_count:
+    bug_numbers:
+      - 1416629
+    description: >
+      The count of number of synthesize response made by service workers.
+    expires: "61"
+    kind: uint
+    notification_emails:
+      - sw-telemetry@mozilla.com
+      - ttung@mozilla.com
+    release_channel_collection: opt-out
+    record_in_processes:
+      - 'main'
+      - 'content'
+
+  cors_res_for_so_req_count:
+    bug_numbers:
+      - 1416629
+    description: >
+      The count of number of synthesize response made by service workers and
+      it's a cors type resposne for a same-origin mode request.
+    expires: "61"
+    kind: uint
+    notification_emails:
+      - sw-telemetry@mozilla.com
+      - ttung@mozilla.com
+    release_channel_collection: opt-out
+    record_in_processes:
+      - 'main'
+      - 'content'
+
 # 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: