TabContents -> WebContentsImpl, part 2.

content/browser/tab_contents/web_drag_source_win.h

-// Copyright (c) 2011 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 CONTENT_BROWSER_TAB_CONTENTS_WEB_DRAG_SOURCE_WIN_H_
-#define CONTENT_BROWSER_TAB_CONTENTS_WEB_DRAG_SOURCE_WIN_H_
-#pragma once
-
-#include "base/basictypes.h"
-#include "content/public/browser/notification_observer.h"
-#include "content/public/browser/notification_registrar.h"
-#include "ui/base/dragdrop/drag_source.h"
-#include "ui/gfx/native_widget_types.h"
-#include "ui/gfx/point.h"
-
-namespace content {
-class RenderViewHost;
-class WebContents;
-}
-
-// An IDropSource implementation for a TabContents. Handles notifications sent
-// by an active drag-drop operation as the user mouses over other drop targets
-// on their system. This object tells Windows whether or not the drag should
-// continue, and supplies the appropriate cursors.
-class WebDragSource : public ui::DragSource,
-                      public content::NotificationObserver {
- public:
-  // Create a new DragSource for a given HWND and WebContents.
-  WebDragSource(gfx::NativeWindow source_wnd,
-                content::WebContents* web_contents);
-  virtual ~WebDragSource();
-
-  // content::NotificationObserver implementation.
-  virtual void Observe(int type,
-                       const content::NotificationSource& source,
-                       const content::NotificationDetails& details);
-
-  void set_effect(DWORD effect) { effect_ = effect; }
-
- protected:
-  // ui::DragSource
-  virtual void OnDragSourceCancel();
-  virtual void OnDragSourceDrop();
-  virtual void OnDragSourceMove();
-
- private:
-  // Cannot construct thusly.
-  WebDragSource();
-
-  // OnDragSourceDrop schedules its main work to be done after IDropTarget::Drop
-  // by posting a task to this function.
-  void DelayedOnDragSourceDrop();
-
-  // Keep a reference to the window so we can translate the cursor position.
-  gfx::NativeWindow source_wnd_;
-
-  // We use this as a channel to the renderer to tell it about various drag
-  // drop events that it needs to know about (such as when a drag operation it
-  // initiated terminates).
-  content::RenderViewHost* render_view_host_;
-
-  content::NotificationRegistrar registrar_;
-
-  DWORD effect_;
-
-  DISALLOW_COPY_AND_ASSIGN(WebDragSource);
-};
-
-#endif  // CONTENT_BROWSER_TAB_CONTENTS_WEB_DRAG_SOURCE_WIN_H_