Convert //sandbox to use std::unique_ptr

sandbox/linux/seccomp-bpf/bpf_tests.h

Index: sandbox/linux/seccomp-bpf/bpf_tests.h
diff --git a/sandbox/linux/seccomp-bpf/bpf_tests.h b/sandbox/linux/seccomp-bpf/bpf_tests.h
index cc4debd4c30b1bdc64b841bea77a1d136fc7b223..8b2b12afd8f11443f9dfbcddb7809ca669bf1256 100644
--- a/sandbox/linux/seccomp-bpf/bpf_tests.h
+++ b/sandbox/linux/seccomp-bpf/bpf_tests.h
@@ -5,6 +5,8 @@
 #ifndef SANDBOX_LINUX_SECCOMP_BPF_BPF_TESTS_H__
 #define SANDBOX_LINUX_SECCOMP_BPF_BPF_TESTS_H__
 
+#include <memory>
+
 #include "base/logging.h"
 #include "base/macros.h"
 #include "build/build_config.h"
@@ -104,8 +106,8 @@ class BPFTesterSimpleDelegate : public BPFTesterDelegate {
       : test_function_(test_function) {}
   ~BPFTesterSimpleDelegate() override {}
 
-  scoped_ptr<bpf_dsl::Policy> GetSandboxBPFPolicy() override {
-    return scoped_ptr<bpf_dsl::Policy>(new PolicyClass());
+  std::unique_ptr<bpf_dsl::Policy> GetSandboxBPFPolicy() override {
+    return std::unique_ptr<bpf_dsl::Policy>(new PolicyClass());
   }
   void RunTestFunction() override {
     DCHECK(test_function_);