Split apart several asynchronous tests to reduce timeouts.

pkg/scheduled_test/test/utils.dart

Index: pkg/scheduled_test/test/utils.dart
diff --git a/pkg/scheduled_test/test/utils.dart b/pkg/scheduled_test/test/utils.dart
index d6c272d4e2e4a9bbc968e205d240d444f78615ed..4dd7ef93c33d238d1b0b3bfa6c8478a421abd702 100644
--- a/pkg/scheduled_test/test/utils.dart
+++ b/pkg/scheduled_test/test/utils.dart
@@ -7,9 +7,12 @@ library test_utils;
 import 'dart:io';
 import 'dart:async';
 
+import 'package:scheduled_test/scheduled_test.dart';
 import 'package:scheduled_test/src/utils.dart';
 import 'package:scheduled_test/src/mock_clock.dart' as mock_clock;
 
+import 'metatest.dart';
+
 export 'package:scheduled_test/src/utils.dart';
 
 /// Wraps [input] to provide a timeout. If [input] completes before
@@ -45,3 +48,14 @@ Future sleep(int milliseconds) {
   });
   return completer.future;
 }
+
+/// Sets up a timeout for every metatest in this file.
+void setUpTimeout() {
+  metaSetUp(() {
+    // TODO(nweiz): We used to only increase the timeout to 10s for the Windows
+    // bots, but the Linux and Mac bots have started taking upwards of 5s when
+    // running pumpEventQueue, so we're increasing the timeout across the board
+    // (see issue 9248).
+    currentSchedule.timeout = new Duration(seconds: 10);
+  });
+}