Give more time to the dart2js transformer tests.

sdk/lib/_internal/pub/test/transformer/dart2js/ignores_nonentrypoint_in_web_test.dart

Index: sdk/lib/_internal/pub/test/transformer/dart2js/ignores_nonentrypoint_in_web_test.dart
diff --git a/sdk/lib/_internal/pub/test/transformer/dart2js/ignores_nonentrypoint_in_web_test.dart b/sdk/lib/_internal/pub/test/transformer/dart2js/ignores_nonentrypoint_in_web_test.dart
index f5922e6ee25fd9fd35b89e1ba8a5d83ce5441773..3e540acc415b5170fba0c368875165573d669926 100644
--- a/sdk/lib/_internal/pub/test/transformer/dart2js/ignores_nonentrypoint_in_web_test.dart
+++ b/sdk/lib/_internal/pub/test/transformer/dart2js/ignores_nonentrypoint_in_web_test.dart
@@ -4,6 +4,8 @@
 
 library pub_tests;
 
+import 'package:scheduled_test/scheduled_test.dart';
+
 import '../../descriptor.dart' as d;
 import '../../test_pub.dart';
 import '../../serve/utils.dart';
@@ -11,6 +13,10 @@ import '../../serve/utils.dart';
 main() {
   initConfig();
   integration("ignores a non-entrypoint library in web", () {
+    // Dart2js can take a long time to compile dart code, so we increase the
+    // timeout to cope with that.
+    currentSchedule.timeout *= 3;
+
     d.dir(appPath, [
       d.appPubspec(),
       d.dir("web", [