Convert //sandbox to use std::unique_ptr

mojo/shell/runner/host/linux_sandbox.h

 // Copyright 2015 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 MOJO_SHELL_RUNNER_HOST_LINUX_SANDBOX_H_
 #define MOJO_SHELL_RUNNER_HOST_LINUX_SANDBOX_H_
 
+#include <memory>
+
 #include "base/files/scoped_file.h"
 #include "base/macros.h"
 #include "sandbox/linux/bpf_dsl/bpf_dsl.h"
 #include "sandbox/linux/bpf_dsl/policy.h"
 #include "sandbox/linux/syscall_broker/broker_process.h"
 
 namespace mojo {
 namespace shell {
 
 // Encapsulates all tasks related to raising the sandbox for mojo runner.
@@ skipping 14 matching lines @@
   // it.
   void EngageSeccompSandbox();
 
   // Performs the dropping of access to the outside world (drops the reference
   // to /proc acquired in Warmup().
   void Seal();
 
  private:
   bool warmed_up_;
   base::ScopedFD proc_fd_;
-  scoped_ptr<sandbox::syscall_broker::BrokerProcess> broker_;
-  scoped_ptr<sandbox::bpf_dsl::Policy> policy_;
+  std::unique_ptr<sandbox::syscall_broker::BrokerProcess> broker_;
+  std::unique_ptr<sandbox::bpf_dsl::Policy> policy_;
 
   DISALLOW_COPY_AND_ASSIGN(LinuxSandbox);
 };
 
 }  // namespace shell
 }  // namespace mojo
 
 #endif  // MOJO_SHELL_RUNNER_HOST_LINUX_SANDBOX_H_