views: Move widget/ directory to ui/views.

views/widget/drop_target_win.h

-// Copyright (c) 2010 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 VIEWS_WIDGET_DROP_TARGET_WIN_H_
-#define VIEWS_WIDGET_DROP_TARGET_WIN_H_
-#pragma once
-
-#include "ui/base/dragdrop/drop_target.h"
-#include "views/widget/drop_helper.h"
-
-namespace views {
-
-class View;
-namespace internal {
-class RootView;
-}
-
-// DropTargetWin takes care of managing drag and drop for NativeWidgetWin. It
-// converts Windows OLE drop messages into Views drop messages.
-//
-// DropTargetWin uses DropHelper to manage the appropriate view to target
-// drop messages at.
-class DropTargetWin : public ui::DropTarget {
- public:
-  explicit DropTargetWin(internal::RootView* root_view);
-  virtual ~DropTargetWin();
-
-  // If a drag and drop is underway and view is the current drop target, the
-  // drop target is set to null.
-  // This is invoked when a View is removed from the RootView to make sure
-  // we don't target a view that was removed during dnd.
-  void ResetTargetViewIfEquals(View* view);
-
- protected:
-  virtual DWORD OnDragOver(IDataObject* data_object,
-                           DWORD key_state,
-                           POINT cursor_position,
-                           DWORD effect);
-
-  virtual void OnDragLeave(IDataObject* data_object);
-
-  virtual DWORD OnDrop(IDataObject* data_object,
-                       DWORD key_state,
-                       POINT cursor_position,
-                       DWORD effect);
-
- private:
-  views::DropHelper helper_;
-
-  DISALLOW_COPY_AND_ASSIGN(DropTargetWin);
-};
-
-}  // namespace views
-
-#endif  // VIEWS_WIDGET_DROP_TARGET_WIN_H_