Move Indexed DB from dedicated thread to task scheduler

content/browser/indexed_db/indexed_db_context_impl.h

 // Copyright (c) 2012 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_INDEXED_DB_CONTEXT_IMPL_H_
 #define CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_CONTEXT_IMPL_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 44 matching lines @@
     FORCE_CLOSE_REASON_MAX
   };
 
   // The indexed db directory.
   static const base::FilePath::CharType kIndexedDBDirectory[];
 
   // If |data_path| is empty, nothing will be saved to disk.
   IndexedDBContextImpl(const base::FilePath& data_path,
                        storage::SpecialStoragePolicy* special_storage_policy,
                        storage::QuotaManagerProxy* quota_manager_proxy,
-                       base::SequencedTaskRunner* task_runner);
+                       scoped_refptr<base::SequencedTaskRunner> task_runner);
 
   IndexedDBFactory* GetIDBFactory();
 
   // Disables the exit-time deletion of session-only data.
   void SetForceKeepSessionState() { force_keep_session_state_ = true; }
 
   // IndexedDBContext implementation:
   base::SequencedTaskRunner* TaskRunner() const override;
   std::vector<IndexedDBInfo> GetAllOriginsInfo() override;
   int64_t GetOriginDiskUsage(const GURL& origin_url) override;
@@ skipping 89 matching lines @@
   scoped_refptr<base::SequencedTaskRunner> task_runner_;
   std::unique_ptr<std::set<url::Origin>> origin_set_;
   std::map<url::Origin, int64_t> origin_size_map_;
 
   DISALLOW_COPY_AND_ASSIGN(IndexedDBContextImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_CONTEXT_IMPL_H_