Destroy the notification database when corruption occurs.

content/browser/notifications/platform_notification_context_impl.h

 // Copyright 2015 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_NOTIFICATIONS_PLATFORM_NOTIFICATION_CONTEXT_IMPL_H_
 #define CONTENT_BROWSER_NOTIFICATIONS_PLATFORM_NOTIFICATION_CONTEXT_IMPL_H_
 
 #include <stdint.h>
 
 #include "base/callback.h"
@@ skipping 48 matching lines @@
   void WriteNotificationData(const GURL& origin,
                              const NotificationDatabaseData& database_data,
                              const WriteResultCallback& callback) override;
   void DeleteNotificationData(int64_t notification_id,
                               const GURL& origin,
                               const DeleteResultCallback& callback) override;
 
   // ServiceWorkerContextObserver implementation.
   void OnRegistrationDeleted(int64_t registration_id,
                              const GURL& pattern) override;
+  void OnStorageWiped() override;
 
  private:
   friend class base::DeleteHelper<PlatformNotificationContextImpl>;
   friend class base::RefCountedThreadSafe<PlatformNotificationContextImpl,
                                         BrowserThread::DeleteOnUIThread>;
   friend struct BrowserThread::DeleteOnThread<BrowserThread::UI>;
   friend class PlatformNotificationContextTest;
 
   ~PlatformNotificationContextImpl() override;
 
@@ skipping 33 matching lines @@
   void DoDeleteNotificationData(int64_t notification_id,
                                 const GURL& origin,
                                 const DeleteResultCallback& callback);
 
   // Deletes all notifications associated with |service_worker_registration_id|
   // belonging to |origin|. Must be called on the |task_runner_| thread.
   void DoDeleteNotificationsForServiceWorkerRegistration(
       const GURL& origin,
       int64_t service_worker_registration_id);
 
+  // Destroys the database regardless of its initialization status. This method
+  // must only be called on the |task_runner_| thread. Returns if the directory
+  // the database was stored in could be emptied.
+  bool DestroyDatabase();
+
   // Returns the path in which the database should be initialized. May be empty.
   base::FilePath GetDatabasePath() const;
 
   // Sets the task runner to use for testing purposes.
   void SetTaskRunnerForTesting(
       const scoped_refptr<base::SequencedTaskRunner>& task_runner);
 
   base::FilePath path_;
 
   scoped_refptr<ServiceWorkerContextWrapper> service_worker_context_;
 
   scoped_refptr<base::SequencedTaskRunner> task_runner_;
   scoped_ptr<NotificationDatabase> database_;
 
   DISALLOW_COPY_AND_ASSIGN(PlatformNotificationContextImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_NOTIFICATIONS_PLATFORM_NOTIFICATION_CONTEXT_IMPL_H_