Linux Sandbox: show Yama status in about:sandbox

content/public/common/sandbox_linux.h

Index: content/public/common/sandbox_linux.h
diff --git a/content/public/common/sandbox_linux.h b/content/public/common/sandbox_linux.h
index 4d2db390759fc2524ed752f198ed95413fdf86e5..a9be3b5470ea5bf3895887bee9847b1e123d813e 100644
--- a/content/public/common/sandbox_linux.h
+++ b/content/public/common/sandbox_linux.h
@@ -23,6 +23,9 @@ enum LinuxSandboxStatus {
   // seccomp-bpf sandbox active.
   kSandboxLinuxSeccompBPF = 1 << 3,
 
+  // The Yama LSM module is present and enforcing.
+  kSandboxLinuxYama = 1 << 4,
+
   // A flag that denotes an invalid sandbox status.
   kSandboxLinuxInvalid = 1 << 31,
 };