--- chromium-22.0.1207.1.org/sandbox/linux/services/libc_urandom_override.cc	2012-07-20 10:21:04.809736036 +0800
+++ chromium-22.0.1207.1/sandbox/linux/services/libc_urandom_override.cc	2012-07-20 10:21:20.102735795 +0800
@@ -8,6 +8,7 @@
 #include <pthread.h>
 #include <stdio.h>
 #include <sys/stat.h>
+#include <unistd.h>
 
 #include "base/eintr_wrapper.h"
 #include "base/logging.h"