Eliminate ash::internal namespace

ash/system/tray/throbber_view.cc

 // Copyright (c) 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/tray/throbber_view.h"
 
 #include "ash/system/tray/tray_constants.h"
 #include "grit/ash_resources.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/compositor/layer.h"
 #include "ui/compositor/scoped_layer_animation_settings.h"
 
 namespace ash {
-namespace internal {
-
 namespace {
 
 // Time in ms per throbber frame.
 const int kThrobberFrameMs = 30;
 
 // Duration for showing/hiding animation in milliseconds.
 const int kThrobberAnimationDurationMs = 200;
 
 }  // namespace
 
@@ skipping 73 matching lines @@
   // Stop any previous animation.
   layer()->GetAnimator()->StopAnimating();
 
   ui::ScopedLayerAnimationSettings animation(layer()->GetAnimator());
   animation.SetTransitionDuration(
       base::TimeDelta::FromMilliseconds(kThrobberAnimationDurationMs));
 
   layer()->SetOpacity(start_throbber ? 1.0 : 0.0);
 }
 
-}  // namespace internal
 }  // namespace ash