Update from https://crrev.com/309717

sandbox/linux/seccomp-bpf/sandbox_bpf_test_runner.h

 // 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.
 
 #ifndef SANDBOX_LINUX_SECCOMP_BPF_SANDBOX_BPF_TEST_RUNNER_H_
 #define SANDBOX_LINUX_SECCOMP_BPF_SANDBOX_BPF_TEST_RUNNER_H_
 
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "sandbox/linux/tests/sandbox_test_runner.h"
@@ skipping 27 matching lines @@
 // initialize a seccomp-bpf sandbox (specified by |bpf_tester_delegate|) and
 // run a test function (via |bpf_tester_delegate|) if the current kernel
 // configuration allows it. If it can not run the test under seccomp-bpf,
 // Run() will still compile the policy which should allow to get some coverage
 // under tools such as Valgrind.
 class SandboxBPFTestRunner : public SandboxTestRunner {
  public:
   // This constructor takes ownership of the |bpf_tester_delegate| object.
   // (It doesn't take a scoped_ptr since they make polymorphism verbose).
   explicit SandboxBPFTestRunner(BPFTesterDelegate* bpf_tester_delegate);
-  virtual ~SandboxBPFTestRunner();
+  ~SandboxBPFTestRunner() override;
 
-  virtual void Run() override;
+  void Run() override;
 
-  virtual bool ShouldCheckForLeaks() const override;
+  bool ShouldCheckForLeaks() const override;
 
  private:
   scoped_ptr<BPFTesterDelegate> bpf_tester_delegate_;
   DISALLOW_COPY_AND_ASSIGN(SandboxBPFTestRunner);
 };
 
 }  // namespace sandbox
 
 #endif  // SANDBOX_LINUX_SECCOMP_BPF_SANDBOX_BPF_TEST_RUNNER_H_