Moves DragDropClient to aura/client

ui/views/widget/desktop_aura/desktop_drag_drop_client_aurax11.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 "ui/views/widget/desktop_aura/desktop_drag_drop_client_aurax11.h"
 
-#include <X11/Xatom.h>
 #include <stddef.h>
 #include <stdint.h>
+#include <X11/Xatom.h>
 
 #include "base/event_types.h"
 #include "base/lazy_instance.h"
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
 #include "base/message_loop/message_loop.h"
 #include "base/metrics/histogram_macros.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 #include "ui/aura/client/capture_client.h"
+#include "ui/aura/client/drag_drop_client.h"
 #include "ui/aura/window.h"
 #include "ui/aura/window_tree_host.h"
 #include "ui/base/clipboard/clipboard.h"
 #include "ui/base/dragdrop/drop_target_event.h"
 #include "ui/base/dragdrop/os_exchange_data.h"
 #include "ui/base/dragdrop/os_exchange_data_provider_aurax11.h"
 #include "ui/base/x/selection_utils.h"
 #include "ui/base/x/x11_util.h"
 #include "ui/base/x/x11_window_event_manager.h"
 #include "ui/display/screen.h"
 #include "ui/events/event.h"
 #include "ui/events/event_utils.h"
 #include "ui/events/platform/platform_event_source.h"
 #include "ui/gfx/image/image_skia.h"
 #include "ui/views/controls/image_view.h"
 #include "ui/views/widget/desktop_aura/desktop_native_cursor_manager.h"
 #include "ui/views/widget/desktop_aura/x11_topmost_window_finder.h"
 #include "ui/views/widget/desktop_aura/x11_whole_screen_move_loop.h"
 #include "ui/views/widget/widget.h"
-#include "ui/wm/public/drag_drop_client.h"
 #include "ui/wm/public/drag_drop_delegate.h"
 
 // Reading recommended for understanding the implementation in this file:
 //
 // * The X Window System Concepts section in The X New Developer’s Guide
 // * The X Selection Mechanism paper by Keith Packard
 // * The Peer-to-Peer Communication by Means of Selections section in the
 //   ICCCM (X Consortium's Inter-Client Communication Conventions Manual)
 // * The XDND specification, Drag-and-Drop Protocol for the X Window System
 // * The XDS specification, The Direct Save Protocol for the X Window System
@@ skipping 1317 matching lines @@
     for (int x = 0; x < in_bitmap->width(); ++x) {
       if (SkColorGetA(in_row[x]) > kMinAlpha)
         return true;
     }
   }
 
   return false;
 }
 
 }  // namespace views