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

apps/app_shim/test/app_shim_host_manager_test_api_mac.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 "apps/app_shim/test/app_shim_host_manager_test_api_mac.h"
 
 #include "apps/app_shim/app_shim_host_manager_mac.h"
 #include "base/files/file_path.h"
 
 namespace test {
 
-// static
-void AppShimHostManagerTestApi::OverrideUserDataDir(
-    const base::FilePath& user_data_dir) {
-  CR_DEFINE_STATIC_LOCAL(base::FilePath, override_user_data_dir, ());
-  override_user_data_dir = user_data_dir;
-  AppShimHostManager::g_override_user_data_dir_ = &override_user_data_dir;
-}
-
 AppShimHostManagerTestApi::AppShimHostManagerTestApi(
     AppShimHostManager* host_manager)
     : host_manager_(host_manager) {
   DCHECK(host_manager_);
 }
 
 IPC::ChannelFactory* AppShimHostManagerTestApi::factory() {
   return host_manager_->factory_.get();
 }
 
+const base::FilePath& AppShimHostManagerTestApi::directory_in_tmp() {
+  return host_manager_->directory_in_tmp_;
+}
+
 }  // namespace test