Remove CLASSHASH defines in favour of an enum class.

xfa/fwl/theme/cfwl_edittp.cpp

Index: xfa/fwl/theme/cfwl_edittp.cpp
diff --git a/xfa/fwl/theme/cfwl_edittp.cpp b/xfa/fwl/theme/cfwl_edittp.cpp
index 644da90071e68c6c58d51ef261fad1893bf0ef8e..8e59a4d1f2e953c515356b3df48232680a11ba9d 100644
--- a/xfa/fwl/theme/cfwl_edittp.cpp
+++ b/xfa/fwl/theme/cfwl_edittp.cpp
@@ -15,11 +15,10 @@
 CFWL_EditTP::CFWL_EditTP() {}
 CFWL_EditTP::~CFWL_EditTP() {}
 
-FX_BOOL CFWL_EditTP::IsValidWidget(IFWL_Widget* pWidget) {
-  if (!pWidget)
-    return FALSE;
-  return pWidget->GetClassID() == FWL_CLASSHASH_Edit;
+bool CFWL_EditTP::IsValidWidget(IFWL_Widget* pWidget) {
+  return pWidget && pWidget->GetClassID() == FWL_Type::Edit;
 }
+
 FX_BOOL CFWL_EditTP::DrawBackground(CFWL_ThemeBackground* pParams) {
   switch (pParams->m_iPart) {
     case CFWL_Part::Border: {