Move xfa/include/fwl/{core,basewidget} to xfa/fwl/{core,basewidget}.

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
new file mode 100644
index 0000000000000000000000000000000000000000..271edb7ac854fc1bcd2badf14520e6d2b57a2f49
--- /dev/null
+++ b/xfa/fwl/core/ifwl_dataprovider.h
@@ -0,0 +1,22 @@
+// 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/include/fx_string.h"
+#include "xfa/fwl/core/fwl_error.h"
+
+class IFWL_Widget;
+
+class IFWL_DataProvider {
+ public:
+  virtual ~IFWL_DataProvider() {}
+  virtual FWL_ERR GetCaption(IFWL_Widget* pWidget,
+                             CFX_WideString& wsCaption) = 0;
+};
+
+#endif  // XFA_FWL_CORE_IFWL_DATAPROVIDER_H_