ServiceWorker: OnSimpleEventFinished could be called after timed out

content/browser/service_worker/service_worker_version.cc

Index: content/browser/service_worker/service_worker_version.cc
diff --git a/content/browser/service_worker/service_worker_version.cc b/content/browser/service_worker/service_worker_version.cc
index 21c34b4aa38fc9cf4919c2ee1e87b61505183a57..17e10e5f4761954d8b035d4e0980042d2fbda53d 100644
--- a/content/browser/service_worker/service_worker_version.cc
+++ b/content/browser/service_worker/service_worker_version.cc
@@ -1111,9 +1111,11 @@ void ServiceWorkerVersion::OnSimpleEventFinished(
     int request_id,
     ServiceWorkerStatusCode status,
     base::Time dispatch_event_time) {
-  // Copy error callback before calling FinishRequest.
   PendingRequest* request = pending_requests_.Lookup(request_id);
-  DCHECK(request) << "Invalid request id";
+  // |request| will be null when the request has been timed out.
+  if (!request)
+    return;
+  // Copy error callback before calling FinishRequest.
   StatusCallback callback = request->error_callback;
 
   FinishRequest(request_id, status == SERVICE_WORKER_OK, dispatch_event_time);