Eliminate ash::internal namespace

ash/shelf/shelf_window_watcher_item_delegate.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/shelf/shelf_window_watcher_item_delegate.h"
 
 #include "ash/shelf/shelf_model.h"
 #include "ash/shelf/shelf_util.h"
 #include "ash/shell.h"
 #include "ash/shell_delegate.h"
 #include "ash/wm/window_state.h"
 #include "ui/aura/window.h"
 #include "ui/views/widget/widget.h"
 #include "ui/wm/core/window_animations.h"
 
 namespace ash {
-namespace internal {
 
 ShelfWindowWatcherItemDelegate::ShelfWindowWatcherItemDelegate(
     aura::Window* window, ShelfModel* model)
     : window_(window),
       model_(model) {
 }
 
 ShelfWindowWatcherItemDelegate::~ShelfWindowWatcherItemDelegate() {
 }
 
@@ skipping 34 matching lines @@
 }
 
 bool ShelfWindowWatcherItemDelegate::IsDraggable() {
   return true;
 }
 
 bool ShelfWindowWatcherItemDelegate::ShouldShowTooltip() {
   return true;
 }
 
-}  // namespace internal
 }  // namespace ash