Eliminate ash::internal namespace

ash/system/chromeos/screen_security/screen_capture_tray_item.cc

 // Copyright 2013 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/screen_security/screen_capture_tray_item.h"
 
 #include "ash/shell.h"
 #include "ash/system/system_notifier.h"
 #include "grit/ash_resources.h"
 #include "grit/ash_strings.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/message_center/message_center.h"
 #include "ui/message_center/notification.h"
 
 using message_center::Notification;
 
 namespace ash {
-namespace internal {
 namespace {
 
 const char kScreenCaptureNotificationId[] = "chrome://screen/capture";
 
 }  // namespace
 
 ScreenCaptureTrayItem::ScreenCaptureTrayItem(SystemTray* system_tray)
     : ScreenTrayItem(system_tray) {
   Shell::GetInstance()->system_tray_notifier()->
       AddScreenCaptureObserver(this);
@@ skipping 53 matching lines @@
   Start(stop_callback);
 }
 
 void ScreenCaptureTrayItem::OnScreenCaptureStop() {
   // We do not need to run the stop callback when
   // screen capture is stopped externally.
   set_is_started(false);
   Update();
 }
 
-}  // namespace internal
 }  // namespace ash