Clear UIThreadExtensionFunction::render_frame_host_ when RFH is gone.

extensions/browser/extension_function_dispatcher.cc

Index: extensions/browser/extension_function_dispatcher.cc
diff --git a/extensions/browser/extension_function_dispatcher.cc b/extensions/browser/extension_function_dispatcher.cc
index 96b333cee7defb32c7c2a225c8e0d8db1c80bedd..1c57d936ad2fae1c4548b7b592b4b4cce0fa9ab1 100644
--- a/extensions/browser/extension_function_dispatcher.cc
+++ b/extensions/browser/extension_function_dispatcher.cc
@@ -491,7 +491,11 @@ void ExtensionFunctionDispatcher::DispatchWithCallbackInternal(
     NOTREACHED();
     return;
   }
-  function_ui->SetRenderFrameHost(render_frame_host);
+  if (params.embedded_worker_id != -1) {
+    function_ui->set_is_from_service_worker(true);
+  } else {
+    function_ui->SetRenderFrameHost(render_frame_host);
+  }
   function_ui->set_dispatcher(AsWeakPtr());
   function_ui->set_browser_context(browser_context_);
   if (extension &&