Move Indexed DB from dedicated thread to task scheduler

content/browser/indexed_db/cursor_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_CURSOR_IMPL_H_
 #define CONTENT_BROWSER_INDEXED_DB_CURSOR_IMPL_H_
 
 #include <memory>
 
 #include "base/memory/ref_counted.h"
@@ skipping 28 matching lines @@
       ::indexed_db::mojom::CallbacksAssociatedPtrInfo callbacks) override;
   void Prefetch(
       int32_t count,
       ::indexed_db::mojom::CallbacksAssociatedPtrInfo callbacks) override;
   void PrefetchReset(
       int32_t used_prefetches,
       int32_t unused_prefetches,
       const std::vector<std::string>& unused_blob_uuids) override;
 
  private:
-  class IDBThreadHelper;
+  class IDBSequenceHelper;
 
-  IDBThreadHelper* helper_;
+  IDBSequenceHelper* helper_;
   // This raw pointer is safe because all CursorImpl instances are owned by an
   // IndexedDBDispatcherHost.
   IndexedDBDispatcherHost* dispatcher_host_;
   const url::Origin origin_;
   scoped_refptr<base::SequencedTaskRunner> idb_runner_;
 
   DISALLOW_COPY_AND_ASSIGN(CursorImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_INDEXED_DB_CURSOR_IMPL_H_