It is time.

ui/views/drag_utils.h

-// 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.
-
-#ifndef UI_VIEWS_DRAG_UTILS_H_
-#define UI_VIEWS_DRAG_UTILS_H_
-
-#include "ui/base/dragdrop/drag_drop_types.h"
-#include "ui/gfx/native_widget_types.h"
-#include "ui/views/views_export.h"
-
-namespace gfx {
-class Canvas;
-class Point;
-class Size;
-}
-
-namespace ui {
-class OSExchangeData;
-}
-
-namespace views {
-class Widget;
-
-// Starts a drag operation. This blocks until the drag operation completes.
-VIEWS_EXPORT void RunShellDrag(gfx::NativeView view,
-                               const ui::OSExchangeData& data,
-                               const gfx::Point& location,
-                               int operation,
-                               ui::DragDropTypes::DragEventSource source);
-
-// Returns a canvas that can be used to draw the drag image. Caller owns the
-// returned object. |widget| is Widget hosting the view being dragged.
-VIEWS_EXPORT gfx::Canvas* GetCanvasForDragImage(Widget* widget,
-                                                const gfx::Size& canvas_size);
-
-}  // namespace views
-
-#endif  // UI_VIEWS_DRAG_UTILS_H_