Moves DragDropClient to aura/client

ui/views/controls/button/menu_button_unittest.cc

 // Copyright 2014 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/controls/button/menu_button.h"
 
 #include <memory>
 
 #include "base/macros.h"
 #include "base/strings/utf_string_conversions.h"
 #include "build/build_config.h"
 #include "ui/base/dragdrop/drag_drop_types.h"
 #include "ui/events/test/event_generator.h"
 #include "ui/views/animation/test/ink_drop_host_view_test_api.h"
 #include "ui/views/animation/test/test_ink_drop.h"
 #include "ui/views/controls/button/menu_button_listener.h"
 #include "ui/views/drag_controller.h"
 #include "ui/views/test/views_test_base.h"
 
 #if defined(USE_AURA)
+#include "ui/aura/client/drag_drop_client.h"
 #include "ui/events/event.h"
 #include "ui/events/event_handler.h"
-#include "ui/wm/public/drag_drop_client.h"
 #endif
 
 using base::ASCIIToUTF16;
 
 namespace views {
 
 using test::InkDropHostViewTestApi;
 using test::TestInkDrop;
 
 // A MenuButton subclass that provides access to some MenuButton internals.
@@ skipping 582 matching lines @@
 
   generator()->MoveTouch(gfx::Point(10, 30));
   generator()->ReleaseTouch();
   EXPECT_EQ(Button::STATE_NORMAL, button()->state());
   EXPECT_EQ(nullptr, menu_button_listener.last_source());
 }
 
 #endif  // !defined(OS_MACOSX) || defined(USE_AURA)
 
 }  // namespace views