Update from chromium https://crrev.com/302282

sandbox/linux/seccomp-bpf-helpers/baseline_policy.h

Index: sandbox/linux/seccomp-bpf-helpers/baseline_policy.h
diff --git a/sandbox/linux/seccomp-bpf-helpers/baseline_policy.h b/sandbox/linux/seccomp-bpf-helpers/baseline_policy.h
index 6d434b7be057a5950612b3a7028794baaa38aa11..4169d9c3e27544fba0bb84256b9b623d41a1d85d 100644
--- a/sandbox/linux/seccomp-bpf-helpers/baseline_policy.h
+++ b/sandbox/linux/seccomp-bpf-helpers/baseline_policy.h
@@ -28,11 +28,10 @@ class SANDBOX_EXPORT BaselinePolicy : public bpf_dsl::Policy {
   // |fs_denied_errno| is the errno returned when a filesystem access system
   // call is denied.
   explicit BaselinePolicy(int fs_denied_errno);
-  virtual ~BaselinePolicy();
+  ~BaselinePolicy() override;
 
-  virtual bpf_dsl::ResultExpr EvaluateSyscall(
-      int system_call_number) const override;
-  virtual bpf_dsl::ResultExpr InvalidSyscall() const override;
+  bpf_dsl::ResultExpr EvaluateSyscall(int system_call_number) const override;
+  bpf_dsl::ResultExpr InvalidSyscall() const override;
   pid_t policy_pid() const { return policy_pid_; }
 
  private: