Linux Sandbox: split the GPU policies to their own file.

content/common/sandbox_linux/sandbox_bpf_base_policy_linux.cc

 // Copyright 2013 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 "content/common/sandbox_bpf_base_policy_linux.h"
+#include "content/common/sandbox_linux/sandbox_bpf_base_policy_linux.h"
 
 #include <errno.h>
 
 #include "base/logging.h"
 #include "sandbox/linux/seccomp-bpf-helpers/baseline_policy.h"
 
 namespace content {
 
 namespace {
 
 // The errno used for denied file system access system calls, such as open(2).
 static const int kFSDeniedErrno = EPERM;
 
 }  // namespace.
 
 SandboxBPFBasePolicy::SandboxBPFBasePolicy()
     : baseline_policy_(new sandbox::BaselinePolicy(kFSDeniedErrno)) {}
 SandboxBPFBasePolicy::~SandboxBPFBasePolicy() {}
 
 ErrorCode SandboxBPFBasePolicy::EvaluateSyscall(SandboxBPF* sandbox_compiler,
                                                 int system_call_number) const {
   DCHECK(baseline_policy_);
   return baseline_policy_->EvaluateSyscall(sandbox_compiler,
                                            system_call_number);
 }
 
+bool SandboxBPFBasePolicy::PreSandboxHook() {
+  return true;
+}
+
 int SandboxBPFBasePolicy::GetFSDeniedErrno() {
   return kFSDeniedErrno;
 }
 
 }  // namespace content.