Revert of mojo: Get mojo:leveldb and mojo:filesystem compiled into content.

components/leveldb/leveldb_service_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 COMPONENTS_LEVELDB_LEVELDB_SERVICE_IMPL_H_
-#define COMPONENTS_LEVELDB_LEVELDB_SERVICE_IMPL_H_
-
-#include "base/memory/ref_counted.h"
-#include "components/leveldb/leveldb_file_thread.h"
-#include "components/leveldb/public/interfaces/leveldb.mojom.h"
-
-namespace leveldb {
-
-// Creates LevelDBDatabases based scoped to a |directory|/|dbname|.
-class LevelDBServiceImpl : public LevelDBService {
- public:
-  LevelDBServiceImpl();
-  ~LevelDBServiceImpl() override;
-
-  // Overridden from LevelDBService:
-  void Open(filesystem::DirectoryPtr directory,
-            const mojo::String& dbname,
-            mojo::InterfaceRequest<LevelDBDatabase> database,
-            const OpenCallback& callback) override;
-
- private:
-  // Thread to own the mojo message pipe. Because leveldb spawns multiple
-  // threads that want to call file stuff, we create a dedicated thread to send
-  // and receive mojo message calls.
-  scoped_refptr<LevelDBFileThread> thread_;
-
-  DISALLOW_COPY_AND_ASSIGN(LevelDBServiceImpl);
-};
-
-}  // namespace leveldb
-
-#endif  // COMPONENTS_LEVELDB_LEVELDB_SERVICE_IMPL_H_