Use IS_STARBOARD for file.

base/files/file_util_unittest.cc

@@ -77,7 +77,7 @@
 #include <sys/socket.h>
 #endif
 
-#if BUILDFLAG(IS_LINUX) && !defined(IS_COBALT_HERMETIC_BUILD) || BUILDFLAG(IS_CHROMEOS)
+#if BUILDFLAG(IS_LINUX) && !BUILDFLAG(IS_STARBOARD) || BUILDFLAG(IS_CHROMEOS)
 #include <linux/fs.h>
 #endif
 
@@ -1912,7 +1912,7 @@ TEST_F(FileUtilTest, DeleteDirRecursiveWithOpenFile) {
              File::FLAG_CREATE | File::FLAG_READ | File::FLAG_WRITE);
   ASSERT_TRUE(PathExists(file_name3));
 
-#if BUILDFLAG(IS_LINUX) && !defined(IS_COBALT_HERMETIC_BUILD) || BUILDFLAG(IS_CHROMEOS)
+#if BUILDFLAG(IS_LINUX) && !BUILDFLAG(IS_STARBOARD) || BUILDFLAG(IS_CHROMEOS)
   // On Windows, holding the file open in sufficient to make it un-deletable.
   // The POSIX code is verifiable on Linux by creating an "immutable" file but
   // this is best-effort because it's not supported by all file systems. Both
@@ -1933,7 +1933,7 @@ TEST_F(FileUtilTest, DeleteDirRecursiveWithOpenFile) {
   DeletePathRecursively(test_subdir);
   EXPECT_FALSE(PathExists(file_name2));
 
-#if BUILDFLAG(IS_LINUX) && !defined(IS_COBALT_HERMETIC_BUILD) || BUILDFLAG(IS_CHROMEOS)
+#if BUILDFLAG(IS_LINUX) && !BUILDFLAG(IS_STARBOARD) || BUILDFLAG(IS_CHROMEOS)
   // Make sure that the test can clean up after itself.
   if (file_attrs_supported) {
     flags &= ~FS_IMMUTABLE_FL;

base/files/important_file_writer_cleaner.cc

@@ -25,7 +25,7 @@ namespace base {
 namespace {
 
 base::Time GetUpperBoundTime() {
-#if BUILDFLAG(IS_ANDROID) || BUILDFLAG(IS_IOS) || BUILDFLAG(IS_FUCHSIA) || defined(IS_COBALT_HERMETIC_BUILD)
+#if BUILDFLAG(IS_ANDROID) || BUILDFLAG(IS_IOS) || BUILDFLAG(IS_FUCHSIA) || BUILDFLAG(IS_STARBOARD)
   // If process creation time is not available then use instance creation
   // time as the upper-bound for old files. Modification times may be
   // rounded-down to coarse-grained increments, e.g. FAT has 2s granularity,