Switch to standard integer types in ipc/.

BUG=138542
[email protected]

Review URL: https://codereview.chromium.org/1546533002

Cr-Commit-Position: refs/heads/master@{#366527}
diff --git a/ipc/unix_domain_socket_util.cc b/ipc/unix_domain_socket_util.cc
index 74053445..fb64cb2 100644
--- a/ipc/unix_domain_socket_util.cc
+++ b/ipc/unix_domain_socket_util.cc
@@ -6,6 +6,7 @@
 
 #include <errno.h>
 #include <fcntl.h>
+#include <stddef.h>
 #include <sys/socket.h>
 #include <sys/stat.h>
 #include <sys/un.h>
@@ -16,6 +17,7 @@
 #include "base/files/scoped_file.h"
 #include "base/logging.h"
 #include "base/posix/eintr_wrapper.h"
+#include "build/build_config.h"
 
 namespace IPC {