Eliminate ash::internal namespace

ash/system/chromeos/screen_security/screen_tray_item_unittest.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_tray_item.h"
 
 #include "ash/shell.h"
 #include "ash/system/chromeos/screen_security/screen_capture_tray_item.h"
 #include "ash/system/chromeos/screen_security/screen_share_tray_item.h"
 #include "ash/system/tray/tray_item_view.h"
 #include "ash/test/ash_test_base.h"
 #include "base/callback.h"
 #include "base/strings/utf_string_conversions.h"
 #include "ui/events/event.h"
 #include "ui/gfx/point.h"
 #include "ui/message_center/message_center.h"
 #include "ui/views/view.h"
 
 namespace ash {
-namespace internal {
 
 // Test with unicode strings.
 const char kTestScreenCaptureAppName[] =
     "\xE0\xB2\xA0\x5F\xE0\xB2\xA0 (Screen Capture Test)";
 const char kTestScreenShareHelperName[] =
     "\xE5\xAE\x8B\xE8\x85\xBE (Screen Share Test)";
 
 SystemTray* GetSystemTray() {
   return Shell::GetInstance()->GetPrimarySystemTray();
 }
@@ skipping 185 matching lines @@
 }
 
 TEST_F(ScreenCaptureTest, SystemTrayInteraction) {
   TestSystemTrayInteraction(this);
 }
 
 TEST_F(ScreenShareTest, SystemTrayInteraction) {
   TestSystemTrayInteraction(this);
 }
 
-} // namespace internal
-} // namespace ash
+}  // namespace ash