Eliminate ash::internal namespace

ash/system/date/tray_date.cc

 // 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.
 
 #include "ash/system/date/tray_date.h"
 
 #include "ash/shell.h"
 #include "ash/system/date/date_default_view.h"
 #include "ash/system/date/date_view.h"
 #include "ash/system/tray/system_tray.h"
 #include "ash/system/tray/system_tray_notifier.h"
 #include "ash/system/tray/tray_item_view.h"
 
 #if defined(OS_CHROMEOS)
 #include "ash/system/chromeos/system_clock_observer.h"
 #endif
 
 namespace ash {
-namespace internal {
 
 TrayDate::TrayDate(SystemTray* system_tray)
     : SystemTrayItem(system_tray),
       time_tray_(NULL),
       default_view_(NULL) {
 #if defined(OS_CHROMEOS)
   system_clock_observer_.reset(new SystemClockObserver());
 #endif
   Shell::GetInstance()->system_tray_notifier()->AddClockObserver(this);
 }
@@ skipping 76 matching lines @@
     time_tray_->UpdateTimeFormat();
   if (default_view_)
     default_view_->GetDateView()->UpdateTimeFormat();
 }
 
 void TrayDate::Refresh() {
   if (time_tray_)
     time_tray_->UpdateText();
 }
 
-}  // namespace internal
 }  // namespace ash