Merge the CFWL_*Imp classes into the IFWL_* classes.

xfa/fwl/lightwidget/cfwl_datetimepicker.cpp

 // 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
 
 #include "xfa/fwl/lightwidget/cfwl_datetimepicker.h"
 
 #include <memory>
 
-#include "xfa/fwl/basewidget/ifwl_datetimepicker.h"
 #include "xfa/fwl/core/fwl_error.h"
+#include "xfa/fwl/core/ifwl_datetimepicker.h"
 #include "xfa/fwl/core/ifwl_widget.h"
 
 IFWL_DateTimePicker* CFWL_DateTimePicker::GetWidget() {
   return static_cast<IFWL_DateTimePicker*>(m_pIface.get());
 }
 
 const IFWL_DateTimePicker* CFWL_DateTimePicker::GetWidget() const {
   return static_cast<IFWL_DateTimePicker*>(m_pIface.get());
 }
 
@@ skipping 139 matching lines @@
 }
 
 FWL_Error CFWL_DateTimePicker::SetEditLimit(int32_t nLimit) {
   return GetWidget()->SetEditLimit(nLimit);
 }
 
 FWL_Error CFWL_DateTimePicker::ModifyEditStylesEx(uint32_t dwStylesExAdded,
                                                   uint32_t dwStylesExRemoved) {
   return GetWidget()->ModifyEditStylesEx(dwStylesExAdded, dwStylesExRemoved);
 }