Eliminate ash::internal namespace

ash/system/chromeos/brightness/tray_brightness.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/brightness/tray_brightness.h"
 
 #include "ash/accelerators/accelerator_controller.h"
 #include "ash/ash_constants.h"
 #include "ash/display/display_manager.h"
 #include "ash/metrics/user_metrics_recorder.h"
@@ skipping 14 matching lines @@
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/gfx/image/image.h"
 #include "ui/views/controls/button/image_button.h"
 #include "ui/views/controls/image_view.h"
 #include "ui/views/controls/label.h"
 #include "ui/views/controls/slider.h"
 #include "ui/views/layout/box_layout.h"
 #include "ui/views/view.h"
 
 namespace ash {
-namespace internal {
-
 namespace tray {
-
 namespace {
 
 // We don't let the screen brightness go lower than this when it's being
 // adjusted via the slider.  Otherwise, if the user doesn't know about the
 // brightness keys, they may turn the backlight off and not know how to turn it
 // back on.
 const double kMinBrightnessPercent = 5.0;
 
 }  // namespace
 
@@ skipping 225 matching lines @@
   // level via an on-screen display.
   if (!Shell::GetInstance()->display_manager()->HasInternalDisplay())
     return;
 
   if (brightness_view_)
     SetDetailedViewCloseDelay(kTrayPopupAutoCloseDelayInSeconds);
   else
     PopupDetailedView(kTrayPopupAutoCloseDelayInSeconds, false);
 }
 
-}  // namespace internal
 }  // namespace ash