Remove FWL_WGTHITTEST_* defines in favour of enum class.

xfa/fwl/basewidget/fwl_listboximp.cpp

 // Copyright 2014 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
 #include "xfa/fwl/basewidget/fwl_listboximp.h"
 
 #include "xfa/fde/tto/fde_textout.h"
 #include "xfa/fwl/basewidget/fwl_comboboximp.h"
@@ skipping 124 matching lines @@
   }
   if (m_pProperties->m_dwStyleExes & FWL_WGTSTYLE_RTLReading) {
     m_dwTTOStyles |= FDE_TTOSTYLE_RTL;
   }
   m_dwTTOStyles |= FDE_TTOSTYLE_SingleLine;
   m_fScorllBarWidth = GetScrollWidth();
   SortItem();
   CalcSize();
   return FWL_ERR_Succeeded;
 }
-uint32_t CFWL_ListBoxImp::HitTest(FX_FLOAT fx, FX_FLOAT fy) {
+FWL_WidgetHit CFWL_ListBoxImp::HitTest(FX_FLOAT fx, FX_FLOAT fy) {
   if (IsShowScrollBar(FALSE)) {
     CFX_RectF rect;
     m_pHorzScrollBar->GetWidgetRect(rect);
-    if (rect.Contains(fx, fy)) {
-      return FWL_WGTHITTEST_HScrollBar;
-    }
+    if (rect.Contains(fx, fy))
+      return FWL_WidgetHit::HScrollBar;
   }
   if (IsShowScrollBar(TRUE)) {
     CFX_RectF rect;
     m_pVertScrollBar->GetWidgetRect(rect);
-    if (rect.Contains(fx, fy)) {
-      return FWL_WGTHITTEST_VScrollBar;
-    }
+    if (rect.Contains(fx, fy))
+      return FWL_WidgetHit::VScrollBar;
   }
-  if (m_rtClient.Contains(fx, fy)) {
-    return FWL_WGTHITTEST_Client;
-  }
-  return FWL_WGTHITTEST_Unknown;
+  if (m_rtClient.Contains(fx, fy))
+    return FWL_WidgetHit::Client;
+  return FWL_WidgetHit::Unknown;
 }
 FWL_ERR CFWL_ListBoxImp::DrawWidget(CFX_Graphics* pGraphics,
                                     const CFX_Matrix* pMatrix) {
   if (!pGraphics)
     return FWL_ERR_Indefinite;
   if (!m_pProperties->m_pThemeProvider)
     return FWL_ERR_Indefinite;
   IFWL_ThemeProvider* pTheme = m_pProperties->m_pThemeProvider;
   pGraphics->SaveGraphState();
   if (HasBorder()) {
@@ skipping 1071 matching lines @@
     pScrollBar->SetTrackPos(fPos);
     m_pOwner->Repaint(&m_pOwner->m_rtClient);
   }
   return TRUE;
 }
 void CFWL_ListBoxImpDelegate::DispatchSelChangedEv() {
   CFWL_EvtLtbSelChanged ev;
   ev.m_pSrcTarget = m_pOwner->m_pInterface;
   m_pOwner->DispatchEvent(&ev);
 }