Standardize usage of virtual/override/final specifiers.

components/nacl/loader/nonsfi/nonsfi_sandbox.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 COMPONENTS_NACL_LOADER_NONSFI_NONSFI_SANDBOX_H_
 #define COMPONENTS_NACL_LOADER_NONSFI_NONSFI_SANDBOX_H_
 
 #include "base/basictypes.h"
 #include "sandbox/linux/bpf_dsl/bpf_dsl_forward.h"
 #include "sandbox/linux/bpf_dsl/policy.h"
 
 namespace nacl {
 namespace nonsfi {
 
 // The seccomp sandbox policy for NaCl non-SFI mode. Note that this
 // policy must be as strong as possible, as non-SFI mode heavily
 // depends on seccomp sandbox.
 class NaClNonSfiBPFSandboxPolicy : public sandbox::bpf_dsl::Policy {
  public:
   explicit NaClNonSfiBPFSandboxPolicy() {}
-  virtual ~NaClNonSfiBPFSandboxPolicy() {}
+  ~NaClNonSfiBPFSandboxPolicy() override {}
 
-  virtual sandbox::bpf_dsl::ResultExpr EvaluateSyscall(
-      int sysno) const override;
-  virtual sandbox::bpf_dsl::ResultExpr InvalidSyscall() const override;
+  sandbox::bpf_dsl::ResultExpr EvaluateSyscall(int sysno) const override;
+  sandbox::bpf_dsl::ResultExpr InvalidSyscall() const override;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(NaClNonSfiBPFSandboxPolicy);
 };
 
 // Initializes seccomp-bpf sandbox for non-SFI NaCl. Returns false on
 // failure.
 bool InitializeBPFSandbox();
 
 }  // namespace nonsfi
 }  // namespace nacl
 
 #endif  // COMPONENTS_NACL_LOADER_NONSFI_NONSFI_SANDBOX_H_