Put app shim IPC socket in a temporary directory. (Mac)

apps/app_shim/app_shim_host_manager_mac.h

 // 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.
 
 #ifndef CHROME_BROWSER_WEB_APPLICATIONS_APP_SHIM_HOST_MANAGER_MAC_H_
 #define CHROME_BROWSER_WEB_APPLICATIONS_APP_SHIM_HOST_MANAGER_MAC_H_
 
 #include "apps/app_shim/extension_app_shim_handler_mac.h"
 #include "base/memory/ref_counted.h"
 #include "content/public/browser/browser_thread.h"
@@ skipping 38 matching lines @@
   virtual void OnListenError() OVERRIDE;
 
   // The |factory_| must be created on a thread which allows blocking I/O, so
   // part of the initialization of this class must be carried out on the file
   // thread.
   void InitOnFileThread();
 
   // Called on the IO thread to begin listening for connections from app shims.
   void ListenOnIOThread();
 
-  // If set, used instead of chrome::DIR_USER_DATA for placing the socket.
-  static const base::FilePath* g_override_user_data_dir_;
+  base::FilePath directory_in_tmp_;
 
   scoped_ptr<IPC::ChannelFactory> factory_;
 
   apps::ExtensionAppShimHandler extension_app_shim_handler_;
 
   DISALLOW_COPY_AND_ASSIGN(AppShimHostManager);
 };
 
 #endif  // CHROME_BROWSER_WEB_APPLICATIONS_APP_SHIM_HOST_MANAGER_MAC_H_