Cleanup IFWL_Adapter interfaces.

xfa/fwl/core/ifwl_adapternative.h

Index: xfa/fwl/core/ifwl_adapternative.h
diff --git a/xfa/fwl/core/ifwl_adapternative.h b/xfa/fwl/core/ifwl_adapternative.h
deleted file mode 100644
index e787658e1913e797a395358efc68182992ef2342..0000000000000000000000000000000000000000
--- a/xfa/fwl/core/ifwl_adapternative.h
+++ /dev/null
@@ -1,24 +0,0 @@
-// 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_ADAPTERNATIVE_H_
-#define XFA_FWL_CORE_IFWL_ADAPTERNATIVE_H_
-
-class CFWL_WidgetMgrDelegate;
-class IFWL_AdapterWidgetMgr;
-class IFWL_AdapterThreadMgr;
-class IFWL_AdapterTimerMgr;
-
-class IFWL_AdapterNative {
- public:
-  virtual ~IFWL_AdapterNative() {}
-  virtual IFWL_AdapterWidgetMgr* GetWidgetMgr(
-      CFWL_WidgetMgrDelegate* pDelegate) = 0;
-  virtual IFWL_AdapterThreadMgr* GetThreadMgr() = 0;
-  virtual IFWL_AdapterTimerMgr* GetTimerMgr() = 0;
-};
-
-#endif  // XFA_FWL_CORE_IFWL_ADAPTERNATIVE_H_