Remove more non-aura windows code.

chrome/browser/download/drag_download_item_views.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 "chrome/browser/download/drag_download_item.h"
 
 #include <string>
 
 #include "chrome/browser/profiles/profile.h"
 #include "content/public/browser/download_item.h"
 #include "net/base/mime_util.h"
 #include "net/base/net_util.h"
 #include "ui/base/dragdrop/drag_drop_types.h"
 #include "ui/base/dragdrop/drag_utils.h"
 #include "ui/base/dragdrop/os_exchange_data.h"
 #include "ui/gfx/image/image.h"
 #include "ui/gfx/point.h"
 #include "ui/gfx/screen.h"
 #include "ui/views/widget/widget.h"
 #include "url/gurl.h"
 
-#if defined(OS_WIN) && !defined(USE_AURA)
-#include "ui/base/dragdrop/drag_source_win.h"
-#include "ui/base/dragdrop/os_exchange_data_provider_win.h"
-#endif
-
 #if defined(USE_AURA)
 #include "ui/aura/client/drag_drop_client.h"
 #include "ui/aura/root_window.h"
 #include "ui/aura/window.h"
 #endif
 
 #if defined(OS_CHROMEOS)
 #include "chrome/browser/chromeos/drive/download_handler.h"
 #endif
 
@@ skipping 64 matching lines @@
 
   views::NativeWidgetGtk* widget = static_cast<views::NativeWidgetGtk*>(
       views::Widget::GetWidgetForNativeView(root)->native_widget());
   if (!widget)
     return;
 
   widget->DoDrag(data,
                  ui::DragDropTypes::DRAG_COPY | ui::DragDropTypes::DRAG_LINK);
 #endif  // TOOLKIT_GTK
 }