Make use of CreateInterfacePtrAndBind() where appropriate

components/filesystem/public/cpp/prefs/filesystem_json_pref_store.cc

Index: components/filesystem/public/cpp/prefs/filesystem_json_pref_store.cc
diff --git a/components/filesystem/public/cpp/prefs/filesystem_json_pref_store.cc b/components/filesystem/public/cpp/prefs/filesystem_json_pref_store.cc
index ffb93b70079ea76be084d6d5bc83ce720fcdc3cf..8a13889bde8d409de6f04c55b5af5318443070fa 100644
--- a/components/filesystem/public/cpp/prefs/filesystem_json_pref_store.cc
+++ b/components/filesystem/public/cpp/prefs/filesystem_json_pref_store.cc
@@ -327,11 +327,8 @@ void FilesystemJsonPrefStore::PerformWrite() {
 }
 
 void FilesystemJsonPrefStore::OpenFilesystem(base::Closure callback) {
-  filesystem::FileSystemClientPtr client;
-  binding_.Bind(GetProxy(&client));
-
   filesystem_->OpenFileSystem(
-      "origin", GetProxy(&directory_), std::move(client),
+      "origin", GetProxy(&directory_), binding_.CreateInterfacePtrAndBind(),
       base::Bind(&FilesystemJsonPrefStore::OnOpenFilesystem, AsWeakPtr(),
                  callback));
 }