Delete the tracing service

components/leveldb/leveldb_app.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_APP_H_
 #define COMPONENTS_LEVELDB_LEVELDB_APP_H_
 
 #include <memory>
 
 #include "base/threading/thread.h"
 #include "components/leveldb/public/interfaces/leveldb.mojom.h"
 #include "mojo/public/cpp/bindings/binding_set.h"
 #include "services/service_manager/public/cpp/binder_registry.h"
 #include "services/service_manager/public/cpp/interface_factory.h"
 #include "services/service_manager/public/cpp/service.h"
-#include "services/tracing/public/cpp/provider.h"
 
 namespace leveldb {
 
 class LevelDBApp
     : public service_manager::Service,
       public service_manager::InterfaceFactory<mojom::LevelDBService> {
  public:
   LevelDBApp();
   ~LevelDBApp() override;
 
  private:
   // |Service| override:
   void OnStart() override;
   void OnBindInterface(const service_manager::ServiceInfo& source_info,
                        const std::string& interface_name,
                        mojo::ScopedMessagePipeHandle interface_pipe) override;
 
   // |InterfaceFactory<mojom::LevelDBService>| implementation:
   void Create(const service_manager::Identity& remote_identity,
               leveldb::mojom::LevelDBServiceRequest request) override;
 
-  tracing::Provider tracing_;
   std::unique_ptr<mojom::LevelDBService> service_;
   service_manager::BinderRegistry registry_;
   mojo::BindingSet<mojom::LevelDBService> bindings_;
 
   base::Thread file_thread_;
 
   DISALLOW_COPY_AND_ASSIGN(LevelDBApp);
 };
 
 }  // namespace leveldb
 
 #endif  // COMPONENTS_LEVELDB_LEVELDB_APP_H_