anchor.diff:          isolate.pauseEvent is! VMPauseExceptionEvent &&
           isolate.pauseEvent is! VMPauseInterruptedEvent &&
           isolate.pauseEvent is! VMResumeEvent) {
  -      await new Future<Null>.delayed(const Duration(milliseconds: 300));
  +      await new Future<Null>.delayed(_kShortTimeout ~/ 10);
         isolate = await vm.isolates.first.loadRunnable();
       }
   
  
positive.code:   static const String _kFlutterExtensionMethod = 'ext.flutter.driver';
    static const String _kSetVMTimelineFlagsMethod = '_setVMTimelineFlags';
    static const String _kGetVMTimelineMethod = '_getVMTimeline';
    static const Duration _kRpcGraceTime = const Duration(seconds: 2);
  
    static int _nextDriverId = 0;
  
  
negative.code:         waitForServiceExtension(),
          // We will never receive the extension event if the user does not
          // register it. If that happens time out.
          new Future<String>.delayed(_kLongTimeout * 2, () => 'timeout')
        ]);
        await whenResumed;
        _log.trace('Waiting for service extension');
  