Quit the message loop by default in ShellConnectionLost when ApplicationRunner is used

components/filesystem/file_system_app.cc

Index: components/filesystem/file_system_app.cc
diff --git a/components/filesystem/file_system_app.cc b/components/filesystem/file_system_app.cc
index 2163351fb9c2227571bcf532d28514140d07c7f6..92f78b7aa68e29a671bc7a87597b820a59da5771 100644
--- a/components/filesystem/file_system_app.cc
+++ b/components/filesystem/file_system_app.cc
@@ -55,10 +55,6 @@ void FileSystemApp::Create(mojo::Connection* connection,
                      lock_table_);
 }
 
-void FileSystemApp::ShellConnectionLost() {
-  _exit(1);
-}
-
 //static
 base::FilePath FileSystemApp::GetUserDataDir() {
   base::FilePath path;