Eliminate ash::internal namespace

ash/system/chromeos/session/logout_confirmation_dialog.cc

 // Copyright 2014 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/chromeos/session/logout_confirmation_dialog.h"
 
 #include "ash/shell.h"
 #include "ash/system/chromeos/session/logout_confirmation_controller.h"
 #include "ash/system/tray/tray_constants.h"
 #include "base/location.h"
 #include "base/time/tick_clock.h"
 #include "grit/ash_strings.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/l10n/time_format.h"
 #include "ui/base/ui_base_types.h"
 #include "ui/gfx/text_constants.h"
 #include "ui/views/border.h"
 #include "ui/views/controls/label.h"
 #include "ui/views/layout/fill_layout.h"
 #include "ui/views/widget/widget.h"
 
 namespace ash {
-namespace internal {
-
 namespace {
 
 const int kCountdownUpdateIntervalMs = 1000;  // 1 second.
 
 const int kHalfSecondInMs = 500;  // Half a second.
 
 }  // namespace
 
 LogoutConfirmationDialog::LogoutConfirmationDialog(
     LogoutConfirmationController* controller,
@@ skipping 70 matching lines @@
                                  ui::TimeFormat::LENGTH_LONG,
                                  10,
                                  time_remaining)));
   } else {
     label_->SetText(l10n_util::GetStringUTF16(
         IDS_ASH_LOGOUT_CONFIRMATION_WARNING_NOW));
     update_timer_.Stop();
   }
 }
 
-}  // namespace internal
 }  // namespace ash