Add security OWNERs to mojo directories.

cc/ipc/OWNERS

Index: cc/ipc/OWNERS
diff --git a/cc/ipc/OWNERS b/cc/ipc/OWNERS
index aef66cf4d6c723c53e557bccb9d758d858884c07..9c4b5ed5709e0b3e356ac146fe6046c90c6574a0 100644
--- a/cc/ipc/OWNERS
+++ b/cc/ipc/OWNERS
@@ -6,3 +6,31 @@ per-file *param_traits*.*=jschuh@chromium.org
 per-file *param_traits*.*=kenrb@chromium.org
 per-file *param_traits*.*=nasko@chromium.org
 per-file *param_traits*.*=tsepez@chromium.org
+
+# Changes to IPC serialization require a security review to avoid introducing
+# new sandbox escapes.
+per-file *struct_traits*.*=set noparent
+per-file *struct_traits*.*=dcheng@chromium.org
+per-file *struct_traits*.*=inferno@chromium.org
+per-file *struct_traits*.*=jln@chromium.org
+per-file *struct_traits*.*=jschuh@chromium.org
+per-file *struct_traits*.*=kenrb@chromium.org
+per-file *struct_traits*.*=mkwst@chromium.org
+per-file *struct_traits*.*=nasko@chromium.org
+per-file *struct_traits*.*=palmer@chromium.org
+per-file *struct_traits*.*=tsepez@chromium.org
+per-file *struct_traits*.*=wfh@chromium.org
+
+# Changes to Mojo interfaces require a security review to avoid
+# introducing new sandbox escapes.
+per-file *.mojom=set noparent
+per-file *.mojom=dcheng@chromium.org
+per-file *.mojom=inferno@chromium.org
+per-file *.mojom=jln@chromium.org
+per-file *.mojom=jschuh@chromium.org
+per-file *.mojom=kenrb@chromium.org
+per-file *.mojom=mkwst@chromium.org
+per-file *.mojom=nasko@chromium.org
+per-file *.mojom=palmer@chromium.org
+per-file *.mojom=tsepez@chromium.org
+per-file *.mojom=wfh@chromium.org