Move Indexed DB from dedicated thread to task scheduler

content/browser/indexed_db/database_impl.h

 // Copyright 2016 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_INDEXED_DB_DATABASE_IMPL_H_
 #define CONTENT_BROWSER_INDEXED_DB_DATABASE_IMPL_H_
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "content/common/indexed_db/indexed_db.mojom.h"
@@ skipping 103 matching lines @@
                    int64_t index_id) override;
   void RenameIndex(int64_t transaction_id,
                    int64_t object_store_id,
                    int64_t index_id,
                    const base::string16& new_name) override;
   void Abort(int64_t transaction_id) override;
   void Commit(int64_t transaction_id) override;
   void AckReceivedBlobs(const std::vector<std::string>& uuids) override;
 
  private:
-  class IDBThreadHelper;
+  class IDBSequenceHelper;
 
-  IDBThreadHelper* helper_;
+  IDBSequenceHelper* helper_;
   // This raw pointer is safe because all DatabaseImpl instances are owned by
   // an IndexedDBDispatcherHost.
   IndexedDBDispatcherHost* dispatcher_host_;
   const url::Origin origin_;
   scoped_refptr<base::SequencedTaskRunner> idb_runner_;
 
   DISALLOW_COPY_AND_ASSIGN(DatabaseImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_INDEXED_DB_DATABASE_IMPL_H_