Don't drop messages/events send to a service worker that is stopping.

content/browser/service_worker/embedded_worker_instance.h

 // Copyright 2013 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 CONTENT_BROWSER_SERVICE_WORKER_EMBEDDED_WORKER_INSTANCE_H_
 #define CONTENT_BROWSER_SERVICE_WORKER_EMBEDDED_WORKER_INSTANCE_H_
 
 #include <map>
 #include <vector>
 
@@ skipping 32 matching lines @@
     STOPPED,
     STARTING,
     RUNNING,
     STOPPING,
   };
 
   class Listener {
    public:
     virtual ~Listener() {}
     virtual void OnStarted() {}
-    virtual void OnStopped() {}
+    virtual void OnStopped(Status old_status) {}
     virtual void OnPausedAfterDownload() {}
     virtual void OnReportException(const base::string16& error_message,
                                    int line_number,
                                    int column_number,
                                    const GURL& source_url) {}
     virtual void OnReportConsoleMessage(int source_identifier,
                                         int message_level,
                                         const base::string16& message,
                                         int line_number,
                                         const GURL& source_url) {}
@@ skipping 131 matching lines @@
   ListenerList listener_list_;
 
   base::WeakPtrFactory<EmbeddedWorkerInstance> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(EmbeddedWorkerInstance);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_SERVICE_WORKER_EMBEDDED_WORKER_INSTANCE_H_