Convert //chrome/browser/chromeos from scoped_ptr to std::unique_ptr

chrome/browser/chromeos/power/freezer_cgroup_process_manager.h

 // Copyright 2014 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 CHROME_BROWSER_CHROMEOS_POWER_FREEZER_CGROUP_PROCESS_MANAGER_H_
 #define CHROME_BROWSER_CHROMEOS_POWER_FREEZER_CGROUP_PROCESS_MANAGER_H_
 
+#include <memory>
 #include <string>
 
 #include "base/callback.h"
 #include "base/files/file_path.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
-#include "base/memory/scoped_ptr.h"
 #include "base/process/process_handle.h"
 #include "chrome/browser/chromeos/power/renderer_freezer.h"
 
 namespace base {
 class SequencedTaskRunner;
 }
 
 namespace chromeos {
 
 // Manages all the processes in the freezer cgroup on Chrome OS.
 class FreezerCgroupProcessManager : public RendererFreezer::Delegate {
  public:
   FreezerCgroupProcessManager();
   ~FreezerCgroupProcessManager() override;
 
   // RendererFreezer::Delegate overrides.
   void SetShouldFreezeRenderer(base::ProcessHandle handle,
                                bool frozen) override;
   void FreezeRenderers() override;
   void ThawRenderers(ResultCallback callback) override;
   void CheckCanFreezeRenderers(ResultCallback callback) override;
 
  private:
   scoped_refptr<base::SequencedTaskRunner> file_thread_;
 
   class FileWorker;
-  scoped_ptr<FileWorker> file_worker_;
+  std::unique_ptr<FileWorker> file_worker_;
 
   DISALLOW_COPY_AND_ASSIGN(FreezerCgroupProcessManager);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_POWER_FREEZER_CGROUP_PROCESS_MANAGER_H_