Reverting this as it breaks (at least) the Windows Aura build.

chrome/browser/chromeos/status/timezone_clock_updater.cc

Index: chrome/browser/chromeos/status/timezone_clock_updater.cc
===================================================================
--- chrome/browser/chromeos/status/timezone_clock_updater.cc	(revision 110804)
+++ chrome/browser/chromeos/status/timezone_clock_updater.cc	(working copy)
@@ -1,21 +0,0 @@
-// Copyright (c) 2011 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.
-
-#include "chrome/browser/chromeos/status/timezone_clock_updater.h"
-
-#include "chrome/browser/chromeos/status/clock_menu_button.h"
-#include "chrome/browser/chromeos/system/timezone_settings.h"
-
-TimezoneClockUpdater::TimezoneClockUpdater(ClockMenuButton* button)
-    : button_(button) {
-  chromeos::system::TimezoneSettings::GetInstance()->AddObserver(this);
-}
-
-TimezoneClockUpdater::~TimezoneClockUpdater() {
-  chromeos::system::TimezoneSettings::GetInstance()->RemoveObserver(this);
-}
-
-void TimezoneClockUpdater::TimezoneChanged(const icu::TimeZone& timezone) {
-  button_->UpdateText();
-}