More FWL interface cleanup.

xfa/fwl/core/fwl_threadimp.h

-// Copyright 2014 PDFium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
-
-#ifndef XFA_FWL_CORE_FWL_THREADIMP_H_
-#define XFA_FWL_CORE_FWL_THREADIMP_H_
-
-#include "xfa/fwl/core/fwl_noteimp.h"
-#include "xfa/fwl/core/ifwl_thread.h"
-
-class IFWL_NoteDriver;
-class IFWL_NoteThread;
-
-class CFWL_ThreadImp {
- public:
-  CFWL_ThreadImp(IFWL_Thread* pIface)
-      : m_pNoteDriver(new CFWL_NoteDriver), m_pIface(pIface) {}
-
-  virtual ~CFWL_ThreadImp() { delete m_pNoteDriver; }
-
-  IFWL_Thread* GetInterface() const { return m_pIface; }
-  IFWL_NoteDriver* GetNoteDriver() const { return m_pNoteDriver; }
-
- protected:
-  CFWL_NoteDriver* const m_pNoteDriver;
-
- private:
-  IFWL_Thread* const m_pIface;
-};
-
-#endif  // XFA_FWL_CORE_FWL_THREADIMP_H_