TaskScheduler: migrate appcache database over to use it.

content/browser/appcache/appcache_storage_impl.h

 // Copyright (c) 2011 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_APPCACHE_APPCACHE_STORAGE_IMPL_H_
 #define CONTENT_BROWSER_APPCACHE_APPCACHE_STORAGE_IMPL_H_
 
 #include <stdint.h>
 
 #include <deque>
@@ skipping 20 matching lines @@
 class AppCacheStorageImplTest;
 class ChromeAppCacheServiceTest;
 
 class AppCacheStorageImpl : public AppCacheStorage {
  public:
   explicit AppCacheStorageImpl(AppCacheServiceImpl* service);
   ~AppCacheStorageImpl() override;
 
   void Initialize(
       const base::FilePath& cache_directory,
-      const scoped_refptr<base::SingleThreadTaskRunner>& db_thread,
+      const scoped_refptr<base::SequencedTaskRunner>& db_task_runner,
       const scoped_refptr<base::SingleThreadTaskRunner>& cache_thread);
   void Disable();
   bool is_disabled() const { return is_disabled_; }
 
   // AppCacheStorage methods, see the base class for doc comments.
   void GetAllInfo(Delegate* delegate) override;
   void LoadCache(int64_t id, Delegate* delegate) override;
   void LoadOrCreateGroup(const GURL& manifest_url, Delegate* delegate) override;
   void StoreGroupAndNewestCache(AppCacheGroup* group,
                                 AppCache* newest_cache,
@@ skipping 97 matching lines @@
   // Don't call this when |is_disabled_| is true.
   CONTENT_EXPORT AppCacheDiskCache* disk_cache();
 
   // The directory in which we place files in the file system.
   base::FilePath cache_directory_;
   bool is_incognito_;
 
   // This class operates primarily on the IO thread, but schedules
   // its DatabaseTasks on the db thread. Separately, the disk_cache uses
   // the cache thread.
-  scoped_refptr<base::SingleThreadTaskRunner> db_thread_;
+  scoped_refptr<base::SequencedTaskRunner> db_task_runner_;
   scoped_refptr<base::SingleThreadTaskRunner> cache_thread_;
 
   // Structures to keep track of DatabaseTasks that are in-flight.
   DatabaseTaskQueue scheduled_database_tasks_;
   PendingCacheLoads pending_cache_loads_;
   PendingGroupLoads pending_group_loads_;
   PendingForeignMarkings pending_foreign_markings_;
   PendingQuotaQueries pending_quota_queries_;
 
   // Structures to keep track of lazy response deletion.
@@ skipping 18 matching lines @@
   std::deque<base::Closure> pending_simple_tasks_;
   base::WeakPtrFactory<AppCacheStorageImpl> weak_factory_;
 
   friend class content::AppCacheStorageImplTest;
   friend class content::ChromeAppCacheServiceTest;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_APPCACHE_APPCACHE_STORAGE_IMPL_H_