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

chrome/browser/chromeos/preferences.h

 // Copyright (c) 2012 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_PREFERENCES_H_
 #define CHROME_BROWSER_CHROMEOS_PREFERENCES_H_
 
 #include <string>
 
 #include "ash/shell_observer.h"
@@ skipping 100 matching lines @@
   void OnTouchHudProjectionToggled(bool enabled) override;
 
   // Overriden form user_manager::UserManager::UserSessionStateObserver.
   void ActiveUserChanged(const user_manager::User* active_user) override;
 
   void ActivateInputMethods(const user_manager::User* active_user);
 
   syncable_prefs::PrefServiceSyncable* prefs_;
 
   input_method::InputMethodManager* input_method_manager_;
-  scoped_ptr<TracingManager> tracing_manager_;
+  std::unique_ptr<TracingManager> tracing_manager_;
 
   BooleanPrefMember performance_tracing_enabled_;
   BooleanPrefMember tap_to_click_enabled_;
   BooleanPrefMember tap_dragging_enabled_;
   BooleanPrefMember three_finger_click_enabled_;
   BooleanPrefMember unified_desktop_enabled_by_default_;
   BooleanPrefMember natural_scroll_;
   BooleanPrefMember vert_edge_scroll_enabled_;
   IntegerPrefMember speed_factor_;
   IntegerPrefMember mouse_sensitivity_;
@@ skipping 19 matching lines @@
 
   // User owning these preferences.
   const user_manager::User* user_;
 
   // Whether user is a primary user.
   bool user_is_primary_;
 
   // Input Methods state for this user.
   scoped_refptr<input_method::InputMethodManager::State> ime_state_;
 
-  scoped_ptr<input_method::InputMethodSyncer> input_method_syncer_;
+  std::unique_ptr<input_method::InputMethodSyncer> input_method_syncer_;
 
   DISALLOW_COPY_AND_ASSIGN(Preferences);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_PREFERENCES_H_