anchor.diff:          waitForServiceExtension(),
           // We will never receive the extension event if the user does not
           // register it. If that happens time out.
  -        new Future<String>.delayed(const Duration(seconds: 10), () => 'timeout')
  +        new Future<String>.delayed(_kLongTimeout * 2, () => 'timeout')
         ]);
         await whenResumed;
         _log.trace('Waiting for service extension');
  
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:         isolate.pauseEvent is! VMPauseExceptionEvent &&
          isolate.pauseEvent is! VMPauseInterruptedEvent &&
          isolate.pauseEvent is! VMResumeEvent) {
        await new Future<Null>.delayed(_kShortTimeout ~/ 10);
        isolate = await vm.isolates.first.loadRunnable();
      }
  
  