[ServiceWorker] waitUntil() should wait until all promises got resolved/rejected.

third_party/WebKit/Source/modules/serviceworkers/WaitUntilObserver.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef WaitUntilObserver_h
 #define WaitUntilObserver_h
 
 #include "modules/ModulesExport.h"
 #include "modules/serviceworkers/ServiceWorkerGlobalScopeClient.h"
 #include "platform/Timer.h"
@@ skipping 46 matching lines @@
   void DecrementPendingActivity();
 
   DECLARE_VIRTUAL_TRACE();
 
  private:
   friend class InternalsServiceWorker;
   class ThenFunction;
 
   WaitUntilObserver(ExecutionContext*, EventType, int event_id);
 
-  void ReportError(const ScriptValue&);
+  void ReportPromiseRejected(const ScriptValue&);
 
   void ConsumeWindowInteraction(TimerBase*);
 
   Member<ExecutionContext> execution_context_;
   EventType type_;
   int event_id_;
   int pending_activity_ = 0;
   bool has_error_ = false;
+  bool has_rejected_promise_ = false;
   bool event_dispatched_ = false;
   double event_dispatch_time_ = 0;
   TaskRunnerTimer<WaitUntilObserver> consume_window_interaction_timer_;
 };
 
 }  // namespace blink
 
 #endif  // WaitUntilObserver_h