Fix lifetime of leveldb::MojoEnv instances.

services/file/file_service.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 SERVICES_FILE_FILE_SERVICE_H_
 #define SERVICES_FILE_FILE_SERVICE_H_
 
 #include "base/callback_forward.h"
 #include "base/memory/ref_counted.h"
 #include "components/filesystem/lock_table.h"
 #include "components/leveldb/public/interfaces/leveldb.mojom.h"
 #include "mojo/public/cpp/bindings/binding_set.h"
 #include "services/file/public/interfaces/file_system.mojom.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"
 
+namespace leveldb {
+class MojoEnv;
+}
+
 namespace file {
 
 std::unique_ptr<service_manager::Service> CreateFileService(
-    scoped_refptr<base::SingleThreadTaskRunner> file_service_runner,
+    leveldb::MojoEnv* leveldb_env,
     scoped_refptr<base::SingleThreadTaskRunner> leveldb_service_runner);
 
 class FileService
     : public service_manager::Service,
       public service_manager::InterfaceFactory<mojom::FileSystem>,
       public service_manager::InterfaceFactory<leveldb::mojom::LevelDBService> {
  public:
   FileService(
-      scoped_refptr<base::SingleThreadTaskRunner> file_service_runner,
+      leveldb::MojoEnv* leveldb_env,
       scoped_refptr<base::SingleThreadTaskRunner> leveldb_service_runner);
   ~FileService() 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::FileSystem>| implementation:
   void Create(const service_manager::Identity& remote_identity,
               mojom::FileSystemRequest request) override;
 
   // |InterfaceFactory<LevelDBService>| implementation:
   void Create(const service_manager::Identity& remote_identity,
               leveldb::mojom::LevelDBServiceRequest request) override;
 
   void OnLevelDBServiceError();
 
+  leveldb::MojoEnv* leveldb_env_;
   scoped_refptr<base::SingleThreadTaskRunner> file_service_runner_;
   scoped_refptr<base::SingleThreadTaskRunner> leveldb_service_runner_;
 
   // We create these two objects so we can delete them on the correct task
   // runners.
   class FileSystemObjects;
   std::unique_ptr<FileSystemObjects> file_system_objects_;
 
   class LevelDBServiceObjects;
   std::unique_ptr<LevelDBServiceObjects> leveldb_objects_;
 
   service_manager::BinderRegistry registry_;
 
   DISALLOW_COPY_AND_ASSIGN(FileService);
 };
 
 }  // namespace file
 
 #endif  // SERVICES_FILE_FILE_SERVICE_H_