Update from https://crrev.com/320343

sandbox/linux/bpf_dsl/verifier.h

 // Copyright (c) 2012 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_VERIFIER_H__
-#define SANDBOX_LINUX_SECCOMP_BPF_VERIFIER_H__
+#ifndef SANDBOX_LINUX_BPF_DSL_VERIFIER_H__
+#define SANDBOX_LINUX_BPF_DSL_VERIFIER_H__
 
 #include <stdint.h>
 
 #include <vector>
 
 #include "base/macros.h"
+#include "sandbox/sandbox_export.h"
 
 struct sock_filter;
 
 namespace sandbox {
 struct arch_seccomp_data;
+
 namespace bpf_dsl {
 class Policy;
 class PolicyCompiler;
-}
 
-class Verifier {
+class SANDBOX_EXPORT Verifier {
  public:
   // Evaluate the BPF program for all possible inputs and verify that it
   // computes the correct result. We use the "evaluators" to determine
   // the full set of possible inputs that we have to iterate over.
   // Returns success, if the BPF filter accurately reflects the rules
   // set by the "evaluators".
   // Upon success, "err" is set to NULL. Upon failure, it contains a static
   // error message that does not need to be free()'d.
   static bool VerifyBPF(bpf_dsl::PolicyCompiler* compiler,
                         const std::vector<struct sock_filter>& program,
                         const bpf_dsl::Policy& policy,
                         const char** err);
 
   // Evaluate a given BPF program for a particular set of system call
   // parameters. If evaluation failed for any reason, "err" will be set to
   // a non-NULL error string. Otherwise, the BPF program's result will be
   // returned by the function and "err" is NULL.
   // We do not actually implement the full BPF state machine, but only the
   // parts that can actually be generated by our BPF compiler. If this code
   // is used for purposes other than verifying the output of the sandbox's
   // BPF compiler, we might have to extend this BPF interpreter.
   static uint32_t EvaluateBPF(const std::vector<struct sock_filter>& program,
                               const struct arch_seccomp_data& data,
                               const char** err);
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(Verifier);
 };
 
+}  // namespace bpf_dsl
 }  // namespace sandbox
 
-#endif  // SANDBOX_LINUX_SECCOMP_BPF_VERIFIER_H__
+#endif  // SANDBOX_LINUX_BPF_DSL_VERIFIER_H__