Cleanup FWL Event and Message code.

xfa/fwl/core/cfwl_datetimepicker.cpp

Index: xfa/fwl/core/cfwl_datetimepicker.cpp
diff --git a/xfa/fwl/core/cfwl_datetimepicker.cpp b/xfa/fwl/core/cfwl_datetimepicker.cpp
index 35b038d6cef4df4b3e5a242ead8c90a1260d5d6e..4e12296b131b5e5bc5040e54362316496195e18d 100644
--- a/xfa/fwl/core/cfwl_datetimepicker.cpp
+++ b/xfa/fwl/core/cfwl_datetimepicker.cpp
@@ -10,7 +10,7 @@
 #include <utility>
 
 #include "third_party/base/ptr_util.h"
-#include "xfa/fwl/core/cfwl_evteditchanged.h"
+#include "xfa/fwl/core/cfwl_event.h"
 #include "xfa/fwl/core/cfwl_evtselectchanged.h"
 #include "xfa/fwl/core/cfwl_formproxy.h"
 #include "xfa/fwl/core/cfwl_msgmouse.h"
@@ -192,7 +192,7 @@ void CFWL_DateTimePicker::SetEditText(const CFX_WideString& wsText) {
   m_pEdit->SetText(wsText);
   Repaint(&m_rtClient);
 
-  CFWL_EvtEditChanged ev;
+  CFWL_Event ev(CFWL_EventType::EditChanged);
   DispatchEvent(&ev);
 }