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

components/filesystem/file_system_app.cc

 // Copyright 2015 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.
 
 #include "components/filesystem/file_system_app.h"
 
 #include "base/command_line.h"
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "mojo/shell/public/cpp/connection.h"
@@ skipping 37 matching lines @@
   return true;
 }
 
 // |InterfaceFactory<Files>| implementation:
 void FileSystemApp::Create(mojo::Connection* connection,
                            mojo::InterfaceRequest<FileSystem> request) {
   new FileSystemImpl(connection, std::move(request), GetUserDataDir(),
                      lock_table_.get());
 }
 
-void FileSystemApp::ShellConnectionLost() {
-  _exit(1);
-}
-
 //static
 base::FilePath FileSystemApp::GetUserDataDir() {
   base::FilePath path;
 
   base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
   if (command_line->HasSwitch(kUserDataDir)) {
     path = command_line->GetSwitchValuePath(kUserDataDir);
   } else {
 #if defined(OS_WIN)
     CHECK(PathService::Get(base::DIR_LOCAL_APP_DATA, &path));
@@ skipping 12 matching lines @@
     path = path.Append(FILE_PATH_LITERAL("filesystem"));
   }
 
   if (!base::PathExists(path))
     base::CreateDirectory(path);
 
   return path;
 }
 
 }  // namespace filesystem