Eliminate ash::internal namespace

ash/shelf/shelf_window_watcher.h

 // 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.
 
 #ifndef ASH_SHELF_SHELF_WINDOW_WATCHER_H_
 #define ASH_SHELF_SHELF_WINDOW_WATCHER_H_
 
 #include "ash/shelf/scoped_observer_with_duplicated_sources.h"
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
@@ skipping 11 matching lines @@
 class ActivationClient;
 }
 
 }  // namespace aura
 
 namespace ash {
 
 class ShelfModel;
 class ShelfItemDelegateManager;
 
-namespace internal {
 // ShelfWindowWatcher creates and handles a ShelfItem for windows that have
 // a ShelfItemDetails property in the default container.
 class ShelfWindowWatcher : public aura::client::ActivationChangeObserver,
                            public aura::WindowObserver,
                            public gfx::DisplayObserver {
  public:
   ShelfWindowWatcher(ShelfModel* model,
                      ShelfItemDelegateManager* item_delegate_manager);
   virtual ~ShelfWindowWatcher();
 
@@ skipping 94 matching lines @@
   // Holds removed windows that has an item from default container.
   ScopedObserver<aura::Window, aura::WindowObserver> observed_removed_windows_;
 
   // Holds all observed activation clients.
   ScopedObserverWithDuplicatedSources<aura::client::ActivationClient,
       aura::client::ActivationChangeObserver> observed_activation_clients_;
 
   DISALLOW_COPY_AND_ASSIGN(ShelfWindowWatcher);
 };
 
-}  // namespace internal
 }  // namespace ash
 
 #endif  // ASH_SHELF_SHELF_WINDOW_WATCHER_H_