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

sandbox/linux/seccomp-bpf-helpers/syscall_parameters_restrictions_unittests.cc

 // Copyright 2014 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.
 
 #include "sandbox/linux/seccomp-bpf-helpers/syscall_parameters_restrictions.h"
 
 #include <errno.h>
 #include <sched.h>
 #include <sys/syscall.h>
 #include <time.h>
@@ skipping 24 matching lines @@
 
 // NOTE: most of the parameter restrictions are tested in
 // baseline_policy_unittest.cc as a more end-to-end test.
 
 using sandbox::bpf_dsl::Allow;
 using sandbox::bpf_dsl::ResultExpr;
 
 class RestrictClockIdPolicy : public bpf_dsl::Policy {
  public:
   RestrictClockIdPolicy() {}
-  virtual ~RestrictClockIdPolicy() {}
+  ~RestrictClockIdPolicy() override {}
 
-  virtual ResultExpr EvaluateSyscall(int sysno) const override {
+  ResultExpr EvaluateSyscall(int sysno) const override {
     switch (sysno) {
       case __NR_clock_gettime:
       case __NR_clock_getres:
         return RestrictClockID();
       default:
         return Allow();
     }
   }
 };
 
@@ skipping 80 matching lines @@
       MAKE_PROCESS_CPUCLOCK(kInitPID, CPUCLOCK_SCHED);
 
   struct timespec ts;
   clock_gettime(kInitCPUClockID, &ts);
 }
 #endif  // !defined(OS_ANDROID)
 
 class RestrictSchedPolicy : public bpf_dsl::Policy {
  public:
   RestrictSchedPolicy() {}
-  virtual ~RestrictSchedPolicy() {}
+  ~RestrictSchedPolicy() override {}
 
-  virtual ResultExpr EvaluateSyscall(int sysno) const override {
+  ResultExpr EvaluateSyscall(int sysno) const override {
     switch (sysno) {
       case __NR_sched_getparam:
         return RestrictSchedTarget(getpid(), sysno);
       default:
         return Allow();
     }
   }
 };
 
 void CheckSchedGetParam(pid_t pid, struct sched_param* param) {
@@ skipping 43 matching lines @@
                  DEATH_SEGV_MESSAGE(sandbox::GetErrorMessageContentForTests()),
                  RestrictSchedPolicy) {
   const pid_t kInitPID = 1;
   struct sched_param param;
   sched_getparam(kInitPID, &param);
 }
 
 }  // namespace
 
 }  // namespace sandbox