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

xfa/fwl/core/ifwl_datetimeedit.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 XFA_FWL_CORE_IFWL_DATETIMEEDIT_H_
+#define XFA_FWL_CORE_IFWL_DATETIMEEDIT_H_
+
+#include "xfa/fwl/core/cfwl_message.h"
+#include "xfa/fwl/core/cfwl_widgetimpproperties.h"
+#include "xfa/fwl/core/fwl_error.h"
+#include "xfa/fwl/core/ifwl_edit.h"
+#include "xfa/fwl/core/ifwl_widget.h"
+
+class IFWL_DateTimeEdit : public IFWL_Edit {
+ public:
+  static IFWL_DateTimeEdit* Create(const CFWL_WidgetImpProperties& properties,
+                                   IFWL_Widget* pOuter);
+
+  IFWL_DateTimeEdit(const CFWL_WidgetImpProperties& properties,
+                    IFWL_Widget* pOuter);
+
+  // IFWL_Edit
+  FWL_Error Initialize() override;
+  FWL_Error Finalize() override;
+
+ protected:
+  friend class CFWL_DateTimeEditImpDelegate;
+};
+
+class CFWL_DateTimeEditImpDelegate : public CFWL_EditImpDelegate {
+ public:
+  CFWL_DateTimeEditImpDelegate(IFWL_DateTimeEdit* pOwner);
+  void OnProcessMessage(CFWL_Message* pMessage) override;
+
+ protected:
+  IFWL_DateTimeEdit* m_pOwner;
+
+ private:
+  void DisForm_OnProcessMessage(CFWL_Message* pMessage);
+};
+
+#endif  // XFA_FWL_CORE_IFWL_DATETIMEEDIT_H_