Fix reload_sources_test flake

runtime/observatory/lib/event.dart

 // Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 import 'package:logging/logging.dart';
 import 'package:observatory/models.dart' as M;
 import 'package:observatory/service.dart' as S;
 
 class VMUpdateEvent implements M.VMUpdateEvent {
   final DateTime timestamp;
@@ skipping 121 matching lines @@
   final bool atAsyncSuspension;
   PauseInterruptedEvent(
       this.timestamp, this.isolate, this.topFrame, this.atAsyncSuspension) {
     assert(timestamp != null);
     assert(isolate != null);
     assert(atAsyncSuspension != null);
   }
 }
 
 
-class PausePostRequestEvent implements M.PauseInterruptedEvent {
+class PausePostRequestEvent implements M.PausePostRequestEvent {
   final DateTime timestamp;
   final M.IsolateRef isolate;
   final M.Frame topFrame;
   final bool atAsyncSuspension;
   PausePostRequestEvent(
       this.timestamp, this.isolate, this.topFrame, this.atAsyncSuspension) {
     assert(timestamp != null);
     assert(isolate != null);
     assert(atAsyncSuspension != null);
   }
@@ skipping 192 matching lines @@
     case S.ServiceEvent.kGC:
       return new GCEvent(event.timestamp, event.isolate);
     case S.ServiceEvent.kNone:
       return new NoneEvent(event.timestamp, event.isolate);
     default:
       // Ignore unrecognized events.
       Logger.root.severe('Unrecognized event: $event');
       return null;
   }
 }