Linux sandbox: change seccomp detection and initialization.

sandbox/linux/seccomp-bpf/sandbox_bpf_test_runner.cc

Index: sandbox/linux/seccomp-bpf/sandbox_bpf_test_runner.cc
diff --git a/sandbox/linux/seccomp-bpf/sandbox_bpf_test_runner.cc b/sandbox/linux/seccomp-bpf/sandbox_bpf_test_runner.cc
index cfdb69f5a6b1148c5e5a87480026b418577c5b5c..dc720aa10366e5620ba15c68e92c26f11701d850 100644
--- a/sandbox/linux/seccomp-bpf/sandbox_bpf_test_runner.cc
+++ b/sandbox/linux/seccomp-bpf/sandbox_bpf_test_runner.cc
@@ -31,13 +31,13 @@ void SandboxBPFTestRunner::Run() {
   scoped_ptr<bpf_dsl::Policy> policy =
       bpf_tester_delegate_->GetSandboxBPFPolicy();
 
-  if (sandbox::SandboxBPF::SupportsSeccompSandbox() ==
-      sandbox::SandboxBPF::STATUS_AVAILABLE) {
+  if (sandbox::SandboxBPF::SupportsSeccompSandbox() &
+      SandboxBPF::SECCOMP_SINGLE_THREADED) {
     // Initialize and then start the sandbox with our custom policy
     sandbox::SandboxBPF sandbox;
     sandbox.SetSandboxPolicy(policy.release());
     SANDBOX_ASSERT(
-        sandbox.StartSandbox(sandbox::SandboxBPF::PROCESS_SINGLE_THREADED));
+        sandbox.StartSandbox(sandbox::SandboxBPF::SECCOMP_SINGLE_THREADED));
 
     // Run the actual test.
     bpf_tester_delegate_->RunTestFunction();