Fix lifetime of leveldb::MojoEnv instances.

services/file/file_service.h

Index: services/file/file_service.h
diff --git a/services/file/file_service.h b/services/file/file_service.h
index c91490a69f69e5d8300f187b631c85ba0c4eb4f2..e01fd6a3de859d09bbc99246cdb703a70d40a2fa 100644
--- a/services/file/file_service.h
+++ b/services/file/file_service.h
@@ -15,10 +15,14 @@
 #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
@@ -27,7 +31,7 @@ class FileService
       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;
 
@@ -48,6 +52,7 @@ class FileService
 
   void OnLevelDBServiceError();
 
+  leveldb::MojoEnv* leveldb_env_;
   scoped_refptr<base::SingleThreadTaskRunner> file_service_runner_;
   scoped_refptr<base::SingleThreadTaskRunner> leveldb_service_runner_;