mandoline filesystem: Save cookie data to the mojo:filesystem.

mojo/runner/desktop/main.cc

 // Copyright 2013 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 "base/at_exit.h"
 #include "base/command_line.h"
 #include "mojo/runner/child_process.h"
 #include "mojo/runner/desktop/launcher_process.h"
 #include "mojo/runner/init.h"
+#include "mojo/runner/scoped_user_data_dir.h"
 #include "mojo/runner/switches.h"
 
 int main(int argc, char** argv) {
   base::AtExitManager at_exit;
   base::CommandLine::Init(argc, argv);
 
   mojo::runner::InitializeLogging();
 
+  mojo::runner::ScopedUserDataDir scoped_user_data_dir;
+
   const base::CommandLine& command_line =
       *base::CommandLine::ForCurrentProcess();
   if (command_line.HasSwitch(switches::kChildProcess))
     return mojo::runner::ChildProcessMain();
 
   return mojo::runner::LauncherProcessMain(argc, argv);
 }