Remove include only fwl.h and IWYU.

xfa/include/fwl/basewidget/fwl_listbox.h

Index: xfa/include/fwl/basewidget/fwl_listbox.h
diff --git a/xfa/include/fwl/basewidget/fwl_listbox.h b/xfa/include/fwl/basewidget/fwl_listbox.h
index 7645c2526be0f3984240e8cde24b2f1c5c89c4de..4cf5c654d40891f8f9cfc5d2b5d8f8d3c19494b0 100644
--- a/xfa/include/fwl/basewidget/fwl_listbox.h
+++ b/xfa/include/fwl/basewidget/fwl_listbox.h
@@ -7,10 +7,11 @@
 #ifndef XFA_INCLUDE_FWL_BASEWIDGET_FWL_LISTBOX_H_
 #define XFA_INCLUDE_FWL_BASEWIDGET_FWL_LISTBOX_H_
 
-class CFWL_WidgetImpProperties;
-class IFWL_Widget;
+#include "xfa/include/fwl/core/fwl_note.h"
+#include "xfa/include/fwl/core/fwl_widget.h"
+
 class IFWL_ListBoxDP;
-class IFWL_ListBox;
+
 #define FWL_CLASS_ListBox L"FWL_LISTBOX"
 #define FWL_CLASSHASH_ListBox 1777358317
 #define FWL_STYLEEXT_LTB_MultiSelection (1L << 0)
@@ -49,20 +50,24 @@ class IFWL_ListBox;
 #define FWL_EVT_LTB_DrawItem L"FWL_EVENT_LTB_DrawItem"
 #define FWL_EVTHASH_LTB_SelChanged 1701781688
 #define FWL_EVTHASH_LTB_DrawItem 1050853991
+
 BEGIN_FWL_EVENT_DEF(CFWL_EvtLtbSelChanged, FWL_EVTHASH_LTB_SelChanged)
 CFX_Int32Array iarraySels;
 END_FWL_EVENT_DEF
+
 BEGIN_FWL_EVENT_DEF(CFWL_EvtLtbDrawItem, FWL_EVTHASH_LTB_DrawItem)
 CFX_Graphics* m_pGraphics;
 CFX_Matrix m_matrix;
 int32_t m_index;
 CFX_RectF m_rect;
 END_FWL_EVENT_DEF
+
 typedef struct FWL_HLISTITEM_ { void* pData; } * FWL_HLISTITEM;
 struct FWL_ListBoxItemData {
   IFWL_ListBoxDP* pDataProvider;
   int32_t iIndex;
 };
+
 class IFWL_ListBoxDP : public IFWL_DataProvider {
  public:
   virtual int32_t CountItems(IFWL_Widget* pWidget) = 0;