Split fwl/core class pt I.

xfa/fwl/core/ifwl_dataprovider.h

Index: xfa/fwl/core/ifwl_dataprovider.h
diff --git a/xfa/fwl/core/ifwl_dataprovider.h b/xfa/fwl/core/ifwl_dataprovider.h
deleted file mode 100644
index c4e1a4ea76629e9ab5d08f3ad481a949378e3026..0000000000000000000000000000000000000000
--- a/xfa/fwl/core/ifwl_dataprovider.h
+++ /dev/null
@@ -1,21 +0,0 @@
-// Copyright 2016 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_DATAPROVIDER_H_
-#define XFA_FWL_CORE_IFWL_DATAPROVIDER_H_
-
-#include "core/fxcrt/fx_string.h"
-
-class IFWL_Widget;
-
-class IFWL_DataProvider {
- public:
-  virtual ~IFWL_DataProvider() {}
-
-  virtual void GetCaption(IFWL_Widget* pWidget, CFX_WideString& wsCaption) = 0;
-};
-
-#endif  // XFA_FWL_CORE_IFWL_DATAPROVIDER_H_