Add support for FreeBSD in base/ , base/process/ , and base/threading so that the bootstrap binary …

base/file_util_posix.cc

Index: base/file_util_posix.cc
diff --git a/base/file_util_posix.cc b/base/file_util_posix.cc
index 39b29b3e26bf7dcdb1aae8c389c0d437e41a2f5a..53c64da052fb781dac762b3c57f50661d6b8dec2 100644
--- a/base/file_util_posix.cc
+++ b/base/file_util_posix.cc
@@ -675,7 +675,7 @@ bool GetFileInfo(const FilePath& file_path, File::Info* results) {
 #endif  // defined(OS_ANDROID)
   results->is_directory = S_ISDIR(file_info.st_mode);
   results->size = file_info.st_size;
-#if defined(OS_MACOSX)
+#if defined(OS_MACOSX) || (defined(OS_FREEBSD) && __FreeBSD_version < 900000)
   results->last_modified = Time::FromTimeSpec(file_info.st_mtimespec);
   results->last_accessed = Time::FromTimeSpec(file_info.st_atimespec);
   results->creation_time = Time::FromTimeSpec(file_info.st_ctimespec);