Adaptively use temp dir instead of /dev/shm for executable shmem file on Linux

base/file_util_unittest.cc

 // Copyright (c) 2011 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 "build/build_config.h"
 
 #if defined(OS_WIN)
 #include <windows.h>
 #include <shellapi.h>
 #include <shlobj.h>
@@ skipping 1527 matching lines @@
                   temp_dir_.path(),
                   FILE_PATH_LITERAL("CreateNewTemporaryDirInDirTest"),
                   &new_dir));
   EXPECT_TRUE(file_util::PathExists(new_dir));
   EXPECT_TRUE(temp_dir_.path().IsParent(new_dir));
   EXPECT_TRUE(file_util::Delete(new_dir, false));
 }
 
 TEST_F(FileUtilTest, GetShmemTempDirTest) {
   FilePath dir;
-  EXPECT_TRUE(file_util::GetShmemTempDir(&dir));
+  EXPECT_TRUE(file_util::GetShmemTempDir(&dir, false));
   EXPECT_TRUE(file_util::DirectoryExists(dir));
 }
 
 TEST_F(FileUtilTest, CreateDirectoryTest) {
   FilePath test_root =
       temp_dir_.path().Append(FILE_PATH_LITERAL("create_directory_test"));
 #if defined(OS_WIN)
   FilePath test_path =
       test_root.Append(FILE_PATH_LITERAL("dir\\tree\\likely\\doesnt\\exist\\"));
 #elif defined(OS_POSIX)
@@ skipping 640 matching lines @@
       file_util::VerifyPathControlledByUser(
           base_dir_, text_file_, uid_, ok_gids_));
   EXPECT_TRUE(
       file_util::VerifyPathControlledByUser(
           sub_dir_, text_file_, uid_, ok_gids_));
 }
 
 #endif  // defined(OS_POSIX)
 
 }  // namespace