Several pure virtual IFWL_Adapter* classes not implemented.

xfa/include/fwl/adapter/fwl_adapternative.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_NATIVE_H
 #define _FWL_ADAPTER_NATIVE_H
+
 class IFWL_WidgetMgrDelegate;
 class IFWL_AdapterWidgetMgr;
 class IFWL_AdapterThreadMgr;
 class IFWL_AdapterTimerMgr;
-class IFWL_AdapterCursorMgr;
-class IFWL_AdapterMonitorMgr;
-class IFWL_AdapterClipboardMgr;
 
 class IFWL_AdapterNative {
  public:
   virtual ~IFWL_AdapterNative() {}
   virtual IFWL_AdapterWidgetMgr* GetWidgetMgr(
       IFWL_WidgetMgrDelegate* pDelegate) = 0;
   virtual IFWL_AdapterThreadMgr* GetThreadMgr() = 0;
   virtual IFWL_AdapterTimerMgr* GetTimerMgr() = 0;
-  virtual IFWL_AdapterCursorMgr* GetCursorMgr() = 0;
-  virtual IFWL_AdapterMonitorMgr* GetMonitorMgr() = 0;
-  virtual IFWL_AdapterClipboardMgr* GetClipboardMgr() = 0;
 };
 IFWL_AdapterNative* FWL_CreateFuelAdapterNative();
 void FWL_ReleaseFuelAdapterNative(IFWL_AdapterNative* pAdapterNative);
 #endif