mojo leveldb: Get profile and leveldb connected to DOMStorageContext.

components/filesystem/file_system_impl.h

Index: components/filesystem/file_system_impl.h
diff --git a/components/filesystem/file_system_impl.h b/components/filesystem/file_system_impl.h
index f7a1366f3593cf9a99bf21565d45b2f14a174a17..3bb864a1e213f8da14db7b799c970fb57d2f7b5d 100644
--- a/components/filesystem/file_system_impl.h
+++ b/components/filesystem/file_system_impl.h
@@ -31,7 +31,7 @@ class FileSystemImpl : public FileSystem {
   // |OpenPersistentFileSystem().
   FileSystemImpl(mojo::Connection* connection,
                  mojo::InterfaceRequest<FileSystem> request,
-                 base::FilePath persistent_dir,
+                 const base::FilePath& persistent_dir,
                  LockTable* lock_table);
   ~FileSystemImpl() override;