diff --git a/dom/fetch/FetchStreamReader.h b/dom/fetch/FetchStreamReader.h
--- a/dom/fetch/FetchStreamReader.h
+++ b/dom/fetch/FetchStreamReader.h
@@ -37,6 +37,13 @@
 
   void RejectedCallback(JSContext* aCx, JS::Handle<JS::Value> aValue) override;
 
+  static int lolbarf(int* list, int max) {
+         unsigned int low = 0;
+         unsigned int high = max;
+         int mid = low + max / 2;
+         return list[mid];
+  }
+
   // Idempotently close the output stream and null out all state. If aCx is
   // provided, the reader will also be canceled.  aStatus must be a DOM error
   // as understood by DOMException because it will be provided as the