Fixes bug where clock button wasn't updating in response to a timezone

chrome/browser/ui/views/aura/status_area_host_aura.h

 // 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.
 
 #ifndef CHROME_BROWSER_UI_VIEWS_AURA_STATUS_AREA_HOST_AURA_H_
 #define CHROME_BROWSER_UI_VIEWS_AURA_STATUS_AREA_HOST_AURA_H_
 #pragma once
 
 #include "base/compiler_specific.h"
 #include "chrome/browser/chromeos/status/status_area_button.h"
 
 class StatusAreaView;
+class TimezoneClockUpdater;
 
 namespace views {
+class Views;
 class Widget;
 }
 
 class StatusAreaHostAura : public StatusAreaButton::Delegate {
  public:
   StatusAreaHostAura();
+  virtual ~StatusAreaHostAura();
+
+  // Returns the view housing the status area. Exposed for testing.
+  const views::View* GetStatusArea() const;
 
   // Instantiates and sets |status_area_view_|, and sets it as the contents of
   // a new views::Widget |status_area_widget_| which is returned.
   // The caller is expected to take ownership of |status_area_widget_|.
   views::Widget* CreateStatusArea();
 
   // StatusAreaButton::Delegate implementation.
   virtual bool ShouldExecuteStatusAreaCommand(
       const views::View* button_view, int command_id) const OVERRIDE;
   virtual void ExecuteStatusAreaCommand(
       const views::View* button_view, int command_id) OVERRIDE;
   virtual gfx::Font GetStatusAreaFont(const gfx::Font& font) const OVERRIDE;
   virtual StatusAreaButton::TextStyle GetStatusAreaTextStyle() const OVERRIDE;
   virtual void ButtonVisibilityChanged(views::View* button_view) OVERRIDE;
 
  private:
   // Owned by caller of CreateStatusArea().
   views::Widget* status_area_widget_;
   // Owned by status_area_widget_.
   StatusAreaView* status_area_view_;
 
+  scoped_ptr<TimezoneClockUpdater> timezone_clock_updater_;
+
   DISALLOW_COPY_AND_ASSIGN(StatusAreaHostAura);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_AURA_STATUS_AREA_HOST_AURA_H_