Several pure virtual IFWL_Adapter* classes not implemented.

xfa/include/fwl/adapter/fwl_adapterclipboardmgr.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 _FWL_ADAPTER_CLIPBOARDMGR_H
-#define _FWL_ADAPTER_CLIPBOARDMGR_H
-
-enum FWL_CLIPBOARDFORMAT {
-  FWL_CLIPBOARDFORMAT_Dib,
-  FWL_CLIPBOARDFORMAT_Text,
-  FWL_CLIPBOARDFORMAT_UncodeText,
-};
-typedef struct _FWL_HCLIPBOARDDATA { void* pData; } * FWL_HCLIPBOARDDATA;
-
-class IFWL_AdapterClipboardMgr {
- public:
-  virtual ~IFWL_AdapterClipboardMgr() {}
-  virtual FWL_ERR Empty() = 0;
-  virtual FX_BOOL IsDataAvailable(FX_DWORD dwFormat) = 0;
-  virtual FWL_HCLIPBOARDDATA GetData(FX_DWORD dwFormat) = 0;
-  virtual FWL_ERR SetData(FX_DWORD dwFormat, uint8_t* pBuf, int32_t iSize) = 0;
-  virtual int32_t GetDataSize(FWL_HCLIPBOARDDATA hData) = 0;
-  virtual void* LockDataBuffer(FWL_HCLIPBOARDDATA hData) = 0;
-  virtual FX_BOOL UnLockDataBuffer(FWL_HCLIPBOARDDATA hData) = 0;
-  virtual FWL_ERR SetStringData(const CFX_WideStringC& ws) = 0;
-  virtual FWL_ERR SetStringData(const CFX_ByteStringC& bs) = 0;
-  virtual FWL_ERR GetStringData(CFX_WideString& ws) = 0;
-  virtual FWL_ERR GetStringData(CFX_ByteString& bs) = 0;
-  virtual FWL_ERR EnumFormats(CFX_DWordArray& formats) = 0;
-  virtual FX_DWORD RegisterFormat(const CFX_WideStringC& wsFormat) = 0;
-};
-#endif