Convert //sandbox to use std::unique_ptr

sandbox/linux/suid/client/setuid_sandbox_host.cc

 // 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.
 
 #include "sandbox/linux/suid/client/setuid_sandbox_host.h"
 
 #include <fcntl.h>
 #include <stddef.h>
 #include <stdlib.h>
 #include <sys/stat.h>
 #include <unistd.h>
 
+#include <memory>
 #include <string>
 #include <utility>
 
 #include "base/command_line.h"
 #include "base/environment.h"
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/files/scoped_file.h"
 #include "base/logging.h"
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 #include "base/path_service.h"
 #include "base/posix/eintr_wrapper.h"
 #include "base/process/launch.h"
 #include "base/process/process_metrics.h"
 #include "base/strings/string_number_conversions.h"
 #include "sandbox/linux/suid/common/sandbox.h"
 #include "sandbox/linux/suid/common/suid_unsafe_environment_variables.h"
 
 namespace {
 
@@ skipping 38 matching lines @@
   return saved_env_var_copy;
 }
 
 // The ELF loader will clear many environment variables so we save them to
 // different names here so that the SUID sandbox can resolve them for the
 // renderer.
 void SaveSUIDUnsafeEnvironmentVariables(base::Environment* env) {
   for (unsigned i = 0; kSUIDUnsafeEnvironmentVariables[i]; ++i) {
     const char* env_var = kSUIDUnsafeEnvironmentVariables[i];
     // Get the saved environment variable corresponding to envvar.
-    scoped_ptr<std::string> saved_env_var(CreateSavedVariableName(env_var));
+    std::unique_ptr<std::string> saved_env_var(
+        CreateSavedVariableName(env_var));
     if (saved_env_var == NULL)
       continue;
 
     std::string value;
     if (env->GetVar(env_var, &value))
       env->SetVar(saved_env_var->c_str(), value);
     else
       env->UnSetVar(saved_env_var->c_str());
   }
 }
@@ skipping 96 matching lines @@
   // kZygoteIdFd. Fixing this requires a sandbox API change. :(
   fds_to_remap->push_back(std::make_pair(dummy_fd->get(), kZygoteIdFd));
 }
 
 void SetuidSandboxHost::SetupLaunchEnvironment() {
   SaveSUIDUnsafeEnvironmentVariables(env_.get());
   SetSandboxAPIEnvironmentVariable(env_.get());
 }
 
 }  // namespace sandbox