Remove more non-aura windows code.

chrome/browser/ui/views/tab_contents/web_drag_bookmark_handler_win.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 CHROME_BROWSER_UI_VIEWS_TAB_CONTENTS_WEB_DRAG_BOOKMARK_HANDLER_WIN_H_
-#define CHROME_BROWSER_UI_VIEWS_TAB_CONTENTS_WEB_DRAG_BOOKMARK_HANDLER_WIN_H_
-
-#include "base/compiler_specific.h"
-#include "chrome/browser/bookmarks/bookmark_node_data.h"
-#include "content/public/browser/web_drag_dest_delegate.h"
-
-class BookmarkTabHelper;
-
-namespace content {
-class WebContents;
-}
-
-// Chrome needs to intercept content drag events so it can dispatch them to the
-// bookmarks and extensions system.
-class WebDragBookmarkHandlerWin : public content::WebDragDestDelegate {
- public:
-  WebDragBookmarkHandlerWin();
-  virtual ~WebDragBookmarkHandlerWin();
-
-  // Overridden from content::WebDragDestDelegate:
-  virtual void DragInitialize(content::WebContents* contents) OVERRIDE;
-  virtual void OnDragOver(IDataObject* data_object) OVERRIDE;
-  virtual void OnDragEnter(IDataObject* data_object) OVERRIDE;
-  virtual void OnDrop(IDataObject* data_object) OVERRIDE;
-  virtual void OnDragLeave(IDataObject* data_object) OVERRIDE;
-  virtual bool AddDragData(const content::DropData& drop_data,
-                           ui::OSExchangeData* data) OVERRIDE;
-
- private:
-  // The BookmarkTabHelper.
-  // Weak reference; may be NULL if the contents don't have a
-  // BookmarkTabHelper (e.g. WebUI dialogs).
-  BookmarkTabHelper* bookmark_tab_helper_;
-
-  content::WebContents* web_contents_;
-
-  DISALLOW_COPY_AND_ASSIGN(WebDragBookmarkHandlerWin);
-};
-
-#endif  // CHROME_BROWSER_UI_VIEWS_TAB_CONTENTS_WEB_DRAG_BOOKMARK_HANDLER_WIN_H_