More FWL interface cleanup.

xfa/fwl/core/ifwl_target.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_IFWL_TARGET_H_
-#define XFA_FWL_CORE_IFWL_TARGET_H_
-
-#include "core/fxcrt/include/fx_basic.h"
-#include "xfa/fwl/core/fwl_error.h"
-
-// FWL contains three parallel inheritance hierarchies, which reference each
-// other via pointers as follows:
-//
-//                                           m_pImpl
-//      (nonesuch)              IFWL_Target ----------> CFWL_TargetImp
-//                                   |                       |
-//                                   A                       A
-//                   m_pIface        |                       |
-//      CFWL_Widget ----------> IFWL_Widget             CFWL_WidgetImp
-//           |                       |                       |
-//           A                       A                       A
-//           |                       |                       |
-//      CFWL_...                IFWL_...                CFWL_...Imp
-//
-
-class CFWL_TargetImp;
-
-class IFWL_Target {
- public:
-  IFWL_Target() : m_pImpl(nullptr) {}
-  virtual ~IFWL_Target();
-
-  // These call into equivalent polymorphic methods of m_pImpl. There
-  // should be no need to override these in subclasses.
-  FWL_ERR GetClassName(CFX_WideString& wsClass) const;
-  uint32_t GetClassID() const;
-  FX_BOOL IsInstance(const CFX_WideStringC& wsClass) const;
-  FWL_ERR Initialize();
-  FWL_ERR Finalize();
-
-  CFWL_TargetImp* GetImpl() const { return m_pImpl; }
-
- protected:
-  void SetImpl(CFWL_TargetImp* pImpl) { m_pImpl = pImpl; }
-
- private:
-  CFWL_TargetImp* m_pImpl;
-};
-
-#endif  // XFA_FWL_CORE_IFWL_TARGET_H_