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

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

Index: sandbox/linux/seccomp-bpf-helpers/syscall_parameters_restrictions_unittests.cc
diff --git a/sandbox/linux/seccomp-bpf-helpers/syscall_parameters_restrictions_unittests.cc b/sandbox/linux/seccomp-bpf-helpers/syscall_parameters_restrictions_unittests.cc
index b57ad0106eabbac7671835b19a19e999fd452026..83e848976b3a7a5b29c84289a07382c6222d315d 100644
--- a/sandbox/linux/seccomp-bpf-helpers/syscall_parameters_restrictions_unittests.cc
+++ b/sandbox/linux/seccomp-bpf-helpers/syscall_parameters_restrictions_unittests.cc
@@ -42,9 +42,9 @@ 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:
@@ -145,9 +145,9 @@ BPF_DEATH_TEST_C(ParameterRestrictions,
 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);