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

chrome/browser/chromeos/login/easy_unlock/short_lived_user_context.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_LOGIN_EASY_UNLOCK_SHORT_LIVED_USER_CONTEXT_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_EASY_UNLOCK_SHORT_LIVED_USER_CONTEXT_H_
 
+#include <memory>
+
 #include "apps/app_lifetime_monitor.h"
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 
 namespace base {
 class TaskRunner;
 }
 
 namespace chromeos {
 
 class UserContext;
 
@@ skipping 11 matching lines @@
 
   // The UserContext returned here can be NULL if its time-to-live has expired.
   UserContext* user_context() { return user_context_.get(); }
 
  private:
   void Reset();
 
   // apps::AppLifetimeMonitor::Observer:
   void OnAppDeactivated(Profile* profile, const std::string& app_id) override;
 
-  scoped_ptr<UserContext> user_context_;
+  std::unique_ptr<UserContext> user_context_;
 
   apps::AppLifetimeMonitor* app_lifetime_monitor_;
 
   base::WeakPtrFactory<ShortLivedUserContext> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ShortLivedUserContext);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_EASY_UNLOCK_SHORT_LIVED_USER_CONTEXT_H_