Merge IFWL and CFWL classes.

xfa/fwl/theme/cfwl_listboxtp.cpp

Index: xfa/fwl/theme/cfwl_listboxtp.cpp
diff --git a/xfa/fwl/theme/cfwl_listboxtp.cpp b/xfa/fwl/theme/cfwl_listboxtp.cpp
index 9851349f711a365c5b285a370c45636a5201327e..83568206063303de9303b38306c40a7724bd20ca 100644
--- a/xfa/fwl/theme/cfwl_listboxtp.cpp
+++ b/xfa/fwl/theme/cfwl_listboxtp.cpp
@@ -6,9 +6,9 @@
 
 #include "xfa/fwl/theme/cfwl_listboxtp.h"
 
+#include "xfa/fwl/core/cfwl_listbox.h"
 #include "xfa/fwl/core/cfwl_themebackground.h"
-#include "xfa/fwl/core/ifwl_listbox.h"
-#include "xfa/fwl/core/ifwl_widget.h"
+#include "xfa/fwl/core/cfwl_widget.h"
 #include "xfa/fxgraphics/cfx_color.h"
 #include "xfa/fxgraphics/cfx_path.h"
 
@@ -16,7 +16,7 @@ CFWL_ListBoxTP::CFWL_ListBoxTP() {}
 
 CFWL_ListBoxTP::~CFWL_ListBoxTP() {}
 
-bool CFWL_ListBoxTP::IsValidWidget(IFWL_Widget* pWidget) {
+bool CFWL_ListBoxTP::IsValidWidget(CFWL_Widget* pWidget) {
   return pWidget && pWidget->GetClassID() == FWL_Type::ListBox;
 }