Remove task.h and finish base::Bind() migration.

chrome/browser/ui/views/tab_contents/tab_contents_drag_win.cc

 // 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.
 
 #include "chrome/browser/ui/views/tab_contents/tab_contents_drag_win.h"
 
 #include <windows.h>
 
 #include <string>
 
 #include "base/bind.h"
 #include "base/file_path.h"
 #include "base/message_loop.h"
-#include "base/task.h"
 #include "base/threading/platform_thread.h"
 #include "base/threading/thread.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/bookmarks/bookmark_node_data.h"
 #include "chrome/browser/tab_contents/web_drag_source_win.h"
 #include "chrome/browser/tab_contents/web_drag_utils_win.h"
 #include "chrome/browser/tab_contents/web_drop_target_win.h"
 #include "chrome/browser/ui/views/tab_contents/native_tab_contents_view_win.h"
 #include "chrome/common/url_constants.h"
 #include "content/browser/download/drag_download_file.h"
@@ skipping 336 matching lines @@
 void TabContentsDragWin::OnDataObjectDisposed() {
   DCHECK(drag_drop_thread_id_ == base::PlatformThread::CurrentId());
 
   // The drag-and-drop thread is only closed after OLE is done with
   // DataObjectImpl.
   BrowserThread::PostTask(
       BrowserThread::UI,
       FROM_HERE,
       base::Bind(&TabContentsDragWin::CloseThread, this));
 }