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

chrome/browser/chromeos/status/status_area_view_chromeos.cc

 // 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/status_area_view_chromeos.h"
 
 #include "base/command_line.h"
 #include "chrome/browser/chromeos/cros/cros_library.h"
 #include "chrome/browser/chromeos/status/accessibility_menu_button.h"
 #include "chrome/browser/chromeos/status/caps_lock_menu_button.h"
@@ skipping 12 matching lines @@
   system::TimezoneSettings::GetInstance()->AddObserver(this);
 }
 
 StatusAreaViewChromeos::~StatusAreaViewChromeos() {
   CrosLibrary::Get()->GetPowerLibrary()->RemoveObserver(this);
   system::TimezoneSettings::GetInstance()->RemoveObserver(this);
 }
 
 void StatusAreaViewChromeos::Init(StatusAreaButton::Delegate* delegate,
                                   ScreenMode screen_mode) {
-  AddChromeosButtons(this, delegate, screen_mode);
+  AddChromeosButtons(this, delegate, screen_mode, NULL);
 }
 
 void StatusAreaViewChromeos::SystemResumed() {
   UpdateClockText();
 }
 
 void StatusAreaViewChromeos::TimezoneChanged(const icu::TimeZone& timezone) {
   UpdateClockText();
 }
 
 void StatusAreaViewChromeos::UpdateClockText() {
   ClockMenuButton* clock_button =
       static_cast<ClockMenuButton*>(GetViewByID(VIEW_ID_STATUS_BUTTON_CLOCK));
   if (clock_button)
     clock_button->UpdateText();
 }
 
 void StatusAreaViewChromeos::SetDefaultUse24HourClock(bool use_24hour_clock) {
   ClockMenuButton* clock_button =
       static_cast<ClockMenuButton*>(GetViewByID(VIEW_ID_STATUS_BUTTON_CLOCK));
   if (clock_button)
     clock_button->SetDefaultUse24HourClock(use_24hour_clock);
 }
 
 // static
 void StatusAreaViewChromeos::AddChromeosButtons(
     StatusAreaView* status_area,
     StatusAreaButton::Delegate* delegate,
-    ScreenMode screen_mode) {
+    ScreenMode screen_mode,
+    ClockMenuButton** clock_button) {
   const bool border = true;
   const bool no_border = false;
 
   if (CommandLine::ForCurrentProcess()->HasSwitch(switches::kMemoryWidget))
     status_area->AddButton(new MemoryMenuButton(delegate), no_border);
 
   status_area->AddButton(
       new AccessibilityMenuButton(delegate, screen_mode), border);
   status_area->AddButton(new CapsLockMenuButton(delegate), border);
-  status_area->AddButton(new ClockMenuButton(delegate), border);
+  ClockMenuButton* clock = new ClockMenuButton(delegate);
+  status_area->AddButton(clock, border);
+  if (clock_button)
+    *clock_button = clock;
 
   status_area->AddButton(
       new InputMethodMenuButton(delegate, screen_mode), no_border);
   status_area->AddButton(
       new NetworkMenuButton(delegate, screen_mode), no_border);
   status_area->AddButton(new PowerMenuButton(delegate), no_border);
 }
 
 }  // namespace chromeos