base::Bind: Remove callback_old.h.

chrome/browser/chromeos/system/timezone_settings.h

-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// 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_SYSTEM_TIMEZONE_SETTINGS_H_
 #define CHROME_BROWSER_CHROMEOS_SYSTEM_TIMEZONE_SETTINGS_H_
 #pragma once
 
 #include <string>
 
-#include "base/callback_old.h"
 #include "chrome/browser/cancelable_request.h"
 #include "unicode/timezone.h"
 
 namespace chromeos {
 namespace system {
 
 // This interface provides access to Chrome OS timezone settings.
 class TimezoneSettings : public CancelableRequestProvider {
  public:
   class Observer {
@@ skipping 14 matching lines @@
   virtual void RemoveObserver(Observer* observer) = 0;
 
  protected:
   virtual ~TimezoneSettings() {}
 };
 
 }  // namespace system
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_SYSTEM_TIMEZONE_SETTINGS_H_