Eliminate ash::internal namespace

ash/system/tray/tray_details_view.cc

 // Copyright (c) 2012 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/tray_details_view.h"
 
 #include "ash/system/tray/fixed_sized_scroll_view.h"
 #include "ash/system/tray/system_tray.h"
 #include "ash/system/tray/system_tray_item.h"
 #include "ash/system/tray/tray_constants.h"
 #include "ui/gfx/canvas.h"
 #include "ui/views/background.h"
 #include "ui/views/border.h"
 #include "ui/views/controls/scroll_view.h"
 #include "ui/views/layout/box_layout.h"
 
 namespace ash {
-namespace internal {
 
 class ScrollSeparator : public views::View {
  public:
   ScrollSeparator() {}
 
   virtual ~ScrollSeparator() {}
 
  private:
   // Overriden from views::View.
   virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE {
@@ skipping 125 matching lines @@
     int index = GetIndexOf(scroller_);
     if (index < child_count() - 1 && child_at(index + 1) != footer_)
       scroll_border_->set_visible(true);
     else
       scroll_border_->set_visible(false);
   }
 
   views::View::OnPaintBorder(canvas);
 }
 
-}  // namespace internal
 }  // namespace ash