Change the return type of WTF::bind() to |OwnPtr<Function>|

Source/core/html/parser/HTMLParserThread.cpp

 /*
  * Copyright (C) 2013 Google Inc.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 76 matching lines @@
         postTask(WTF::bind(&HTMLParserThread::setupHTMLParserThread, this));
     }
     return m_thread->platformThread();
 }
 
 bool HTMLParserThread::isRunning()
 {
     return !!m_thread;
 }
 
-void HTMLParserThread::postTask(const Closure& closure)
+void HTMLParserThread::postTask(PassOwnPtr<Closure> closure)
 {
     platformThread().postTask(new Task(closure));
 }
 
 } // namespace blink