ServiceWorker: Confirm the liveness of the associated context before handling message

content/browser/service_worker/service_worker_context_wrapper.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_SERVICE_WORKER_CONTEXT_WRAPPER_H_
 #define CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_CONTEXT_WRAPPER_H_
 
 #include <vector>
 
 #include "base/files/file_path.h"
@@ skipping 11 matching lines @@
 
 namespace quota {
 class QuotaManagerProxy;
 }
 
 namespace content {
 
 class BrowserContext;
 class ServiceWorkerContextCore;
 class ServiceWorkerContextObserver;
+class ServiceWorkerProviderHostRegistry;
 
 // A refcounted wrapper class for our core object. Higher level content lib
 // classes keep references to this class on mutliple threads. The inner core
 // instance is strictly single threaded and is not refcounted, the core object
 // is what is used internally in the service worker lib.
 class CONTENT_EXPORT ServiceWorkerContextWrapper
     : NON_EXPORTED_BASE(public ServiceWorkerContext),
       public base::RefCountedThreadSafe<ServiceWorkerContextWrapper> {
  public:
   ServiceWorkerContextWrapper(BrowserContext* browser_context);
 
   // Init and Shutdown are for use on the UI thread when the profile,
   // storagepartition is being setup and torn down.
   void Init(const base::FilePath& user_data_directory,
             quota::QuotaManagerProxy* quota_manager_proxy);
   void Shutdown();
 
   // The core context is only for use on the IO thread.
   ServiceWorkerContextCore* context();
 
   // The process manager can be used on either UI or IO.
   ServiceWorkerProcessManager* process_manager() {
     return process_manager_.get();
   }
 
+  ServiceWorkerProviderHostRegistry* provider_registry() {
+    return provider_registry_.get();
+  }
+
   // ServiceWorkerContext implementation:
   virtual void RegisterServiceWorker(
       const GURL& pattern,
       const GURL& script_url,
       const ResultCallback& continuation) OVERRIDE;
   virtual void UnregisterServiceWorker(const GURL& pattern,
                                        const ResultCallback& continuation)
       OVERRIDE;
   virtual void Terminate() OVERRIDE;
 
@@ skipping 10 matching lines @@
                     base::SequencedTaskRunner* database_task_runner,
                     base::MessageLoopProxy* disk_cache_thread,
                     quota::QuotaManagerProxy* quota_manager_proxy);
   void ShutdownOnIO();
 
   const scoped_refptr<ObserverListThreadSafe<ServiceWorkerContextObserver> >
       observer_list_;
   const scoped_ptr<ServiceWorkerProcessManager> process_manager_;
   // Cleared in Shutdown():
   scoped_ptr<ServiceWorkerContextCore> context_core_;
+
+  scoped_ptr<ServiceWorkerProviderHostRegistry> provider_registry_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_CONTEXT_WRAPPER_H_