Eliminate ash::internal namespace

ash/system/tray/tray_details_view.h

 // 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.
 
 #ifndef ASH_SYSTEM_TRAY_TRAY_DETAILS_VIEW_H_
 #define ASH_SYSTEM_TRAY_TRAY_DETAILS_VIEW_H_
 
 #include "ash/ash_export.h"
 #include "ash/system/tray/special_popup_row.h"
 #include "ui/views/view.h"
 
 namespace views {
 class ScrollView;
 }
 
 namespace ash {
-
-class SystemTrayItem;
-
-namespace internal {
-
 class FixedSizedScrollView;
 class ScrollBorder;
+class SystemTrayItem;
 class ViewClickListener;
 
 class ASH_EXPORT TrayDetailsView : public views::View {
  public:
   explicit TrayDetailsView(SystemTrayItem* owner);
   virtual ~TrayDetailsView();
 
   // Creates a row with special highlighting etc. This is typically the
   // bottom-most row in the popup.
   void CreateSpecialRow(int string_id, ViewClickListener* listener);
@@ skipping 26 matching lines @@
  private:
   SystemTrayItem* owner_;
   SpecialPopupRow* footer_;
   FixedSizedScrollView* scroller_;
   views::View* scroll_content_;
   ScrollBorder* scroll_border_;  // Weak reference
 
   DISALLOW_COPY_AND_ASSIGN(TrayDetailsView);
 };
 
-}  // namespace internal
 }  // namespace ash
 
 #endif  // ASH_SYSTEM_TRAY_TRAY_DETAILS_VIEW_H_