Cleanup FWL Event and Message code.

xfa/fwl/core/cfwl_message.cpp

Index: xfa/fwl/core/cfwl_message.cpp
diff --git a/xfa/fwl/core/cfwl_message.cpp b/xfa/fwl/core/cfwl_message.cpp
index e233900d6ecf808e5d8c3e3a9e9f746538e4e8e5..b5a9b077e5734709e9c2bc86d6f5e80db99f4361 100644
--- a/xfa/fwl/core/cfwl_message.cpp
+++ b/xfa/fwl/core/cfwl_message.cpp
@@ -6,15 +6,14 @@
 
 #include "xfa/fwl/core/cfwl_message.h"
 
-CFWL_Message::CFWL_Message()
-    : m_pSrcTarget(nullptr), m_pDstTarget(nullptr), m_dwExtend(0) {}
+CFWL_Message::CFWL_Message(CFWL_MessageType type)
+    : m_pSrcTarget(nullptr),
+      m_pDstTarget(nullptr),
+      m_dwExtend(0),
+      m_type(type) {}
 
 CFWL_Message::~CFWL_Message() {}
 
 std::unique_ptr<CFWL_Message> CFWL_Message::Clone() {
   return nullptr;
 }
-
-CFWL_MessageType CFWL_Message::GetClassID() const {
-  return CFWL_MessageType::None;
-}