Remove FWL_WGTHITTEST_* defines in favour of enum class.

xfa/fwl/basewidget/fwl_editimp.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_editimp.h"
 
 #include <algorithm>
 #include <vector>
@@ skipping 304 matching lines @@
   if (m_rtClient.IsEmpty()) {
     return FWL_ERR_Indefinite;
   }
   UpdateEditEngine();
   UpdateVAlignment();
   UpdateScroll();
   InitCaret();
   return FWL_ERR_Succeeded;
 }
 
-uint32_t CFWL_EditImp::HitTest(FX_FLOAT fx, FX_FLOAT fy) {
+FWL_WidgetHit CFWL_EditImp::HitTest(FX_FLOAT fx, FX_FLOAT fy) {
   if (m_pProperties->m_dwStyleExes & FWL_STYLEEXT_EDT_OuterScrollbar) {
     if (IsShowScrollBar(TRUE)) {
       CFX_RectF rect;
       m_pVertScrollBar->GetWidgetRect(rect);
       if (rect.Contains(fx, fy))
-        return FWL_WGTHITTEST_VScrollBar;
+        return FWL_WidgetHit::VScrollBar;
     }
     if (IsShowScrollBar(FALSE)) {
       CFX_RectF rect;
       m_pHorzScrollBar->GetWidgetRect(rect);
       if (rect.Contains(fx, fy))
-        return FWL_WGTHITTEST_HScrollBar;
+        return FWL_WidgetHit::HScrollBar;
     }
   }
   if (m_rtClient.Contains(fx, fy))
-    return FWL_WGTHITTEST_Edit;
-  return FWL_WGTHITTEST_Unknown;
+    return FWL_WidgetHit::Edit;
+  return FWL_WidgetHit::Unknown;
 }
 
 void CFWL_EditImp::AddSpellCheckObj(CFX_Path& PathData,
                                     int32_t nStart,
                                     int32_t nCount,
                                     FX_FLOAT fOffSetX,
                                     FX_FLOAT fOffSetY) {
   FX_FLOAT fStartX = 0.0f;
   FX_FLOAT fEndX = 0.0f;
   FX_FLOAT fY = 0.0f;
@@ skipping 1800 matching lines @@
     }
     CFX_RectF rect;
     m_pOwner->GetWidgetRect(rect);
     CFX_RectF rtInvalidate;
     rtInvalidate.Set(0, 0, rect.width + 2, rect.height + 2);
     m_pOwner->Repaint(&rtInvalidate);
   }
   return TRUE;
 }
 void CFWL_EditImpDelegate::DoCursor(CFWL_MsgMouse* pMsg) {}