Convert //sandbox to use std::unique_ptr

sandbox/linux/seccomp-bpf/bpf_tester_compatibility_delegate.h

Index: sandbox/linux/seccomp-bpf/bpf_tester_compatibility_delegate.h
diff --git a/sandbox/linux/seccomp-bpf/bpf_tester_compatibility_delegate.h b/sandbox/linux/seccomp-bpf/bpf_tester_compatibility_delegate.h
index 00d415c3fc5c93196213046375915a946821a682..a4315ba3c2fbe72a95630ea524c2ecd98e11f887 100644
--- a/sandbox/linux/seccomp-bpf/bpf_tester_compatibility_delegate.h
+++ b/sandbox/linux/seccomp-bpf/bpf_tester_compatibility_delegate.h
@@ -5,8 +5,9 @@
 #ifndef SANDBOX_LINUX_SECCOMP_BPF_BPF_TESTER_COMPATIBILITY_DELEGATE_H_
 #define SANDBOX_LINUX_SECCOMP_BPF_BPF_TESTER_COMPATIBILITY_DELEGATE_H_
 
+#include <memory>
+
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 #include "sandbox/linux/seccomp-bpf/sandbox_bpf_test_runner.h"
 
 namespace sandbox {
@@ -28,12 +29,12 @@ class BPFTesterCompatibilityDelegate : public BPFTesterDelegate {
 
   ~BPFTesterCompatibilityDelegate() override {}
 
-  scoped_ptr<bpf_dsl::Policy> GetSandboxBPFPolicy() override {
+  std::unique_ptr<bpf_dsl::Policy> GetSandboxBPFPolicy() override {
     // The current method is guaranteed to only run in the child process
     // running the test. In this process, the current object is guaranteed
     // to live forever. So it's ok to pass aux_pointer_for_policy_ to
     // the policy, which could in turn pass it to the kernel via Trap().
-    return scoped_ptr<bpf_dsl::Policy>(new Policy(&aux_));
+    return std::unique_ptr<bpf_dsl::Policy>(new Policy(&aux_));
   }
 
   void RunTestFunction() override {