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

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

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef SANDBOX_LINUX_SECCOMP_BPF_HELPERS_BASELINE_POLICY_H_
 #define SANDBOX_LINUX_SECCOMP_BPF_HELPERS_BASELINE_POLICY_H_
 
 #include "sandbox/linux/bpf_dsl/bpf_dsl_forward.h"
 #include "sandbox/linux/bpf_dsl/policy.h"
 #include "sandbox/sandbox_export.h"
@@ skipping 10 matching lines @@
 // alteration of it, and it represents a reasonable common ground to run most
 // code in a sandboxed environment.
 // A baseline policy is only valid for the process for which this object was
 // instantiated (so do not fork() and use it in a child).
 class SANDBOX_EXPORT BaselinePolicy : public bpf_dsl::Policy {
  public:
   BaselinePolicy();
   // |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:
   int fs_denied_errno_;
 
   // The PID that the policy applies to (should be equal to the current pid).
   pid_t policy_pid_;
 
   DISALLOW_COPY_AND_ASSIGN(BaselinePolicy);
 };
 
 }  // namespace sandbox.
 
 #endif  // SANDBOX_LINUX_SECCOMP_BPF_HELPERS_BASELINE_POLICY_H_