Remove stl_util's deletion functions from chromeos/.

chromeos/settings/timezone_settings.h

 // Copyright 2013 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 CHROMEOS_SETTINGS_TIMEZONE_SETTINGS_H_
 #define CHROMEOS_SETTINGS_TIMEZONE_SETTINGS_H_
 
 #include <vector>
 
 #include "base/strings/string16.h"
@@ skipping 24 matching lines @@
   virtual const icu::TimeZone& GetTimezone() = 0;
   virtual base::string16 GetCurrentTimezoneID() = 0;
 
   // Sets the current timezone and notifies all Observers.
   virtual void SetTimezone(const icu::TimeZone& timezone) = 0;
   virtual void SetTimezoneFromID(const base::string16& timezone_id) = 0;
 
   virtual void AddObserver(Observer* observer) = 0;
   virtual void RemoveObserver(Observer* observer) = 0;
 
-  virtual const std::vector<icu::TimeZone*>& GetTimezoneList() const = 0;
+  virtual const std::vector<std::unique_ptr<icu::TimeZone>>& GetTimezoneList()
+      const = 0;
 
   // Gets timezone ID which is also used as timezone pref value.
   static base::string16 GetTimezoneID(const icu::TimeZone& timezone);
 
  protected:
   virtual ~TimezoneSettings() {}
 };
 
 }  // namespace system
 }  // namespace chromeos
 
 #endif  // CHROMEOS_SETTINGS_TIMEZONE_SETTINGS_H_