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/ipc_test_sink.cc b/ipc/ipc_test_sink.cc
index ab95a19..316609c 100644
--- a/ipc/ipc_test_sink.cc
+++ b/ipc/ipc_test_sink.cc
@@ -4,6 +4,10 @@
 
 #include "ipc/ipc_test_sink.h"
 
+#include <stddef.h>
+#include <stdint.h>
+
+#include "build/build_config.h"
 #include "ipc/ipc_listener.h"
 #include "ipc/ipc_message.h"