UserGestureIndicator: remove many unnecessary calls to isMainThread

extensions/renderer/request_sender.cc

Index: extensions/renderer/request_sender.cc
diff --git a/extensions/renderer/request_sender.cc b/extensions/renderer/request_sender.cc
index 896008d656ecf8371e1726c51c989cbca0262052..76ed369f4f1bea0b17abbf8511ffe8626541372d 100644
--- a/extensions/renderer/request_sender.cc
+++ b/extensions/renderer/request_sender.cc
@@ -102,7 +102,7 @@ bool RequestSender::StartRequest(Source* source,
   params.request_id = request_id;
   params.has_callback = has_callback;
   params.user_gesture =
-      blink::WebUserGestureIndicator::isProcessingUserGesture();
+      blink::WebUserGestureIndicator::isProcessingUserGestureThreadSafe();
 
   // Set Service Worker specific params to default values.
   params.worker_thread_id = -1;