Remove FWL_WGTHITTEST_* defines in favour of enum class.

xfa/fxfa/app/xfa_ffwidgethandler.cpp

Index: xfa/fxfa/app/xfa_ffwidgethandler.cpp
diff --git a/xfa/fxfa/app/xfa_ffwidgethandler.cpp b/xfa/fxfa/app/xfa_ffwidgethandler.cpp
index df8e42466226538e964ff1a6b0873008fd4c5fdf..314b22731a01a93a2845f0b032596b8f134ebc91 100644
--- a/xfa/fxfa/app/xfa_ffwidgethandler.cpp
+++ b/xfa/fxfa/app/xfa_ffwidgethandler.cpp
@@ -160,11 +160,11 @@ FX_BOOL CXFA_FFWidgetHandler::OnChar(CXFA_FFWidget* hWidget,
   return bRet;
 }
 
-uint32_t CXFA_FFWidgetHandler::OnHitTest(CXFA_FFWidget* hWidget,
-                                         FX_FLOAT fx,
-                                         FX_FLOAT fy) {
+FWL_WidgetHit CXFA_FFWidgetHandler::OnHitTest(CXFA_FFWidget* hWidget,
+                                              FX_FLOAT fx,
+                                              FX_FLOAT fy) {
   if (!(hWidget->GetStatus() & XFA_WIDGETSTATUS_Visible))
-    return FWL_WGTHITTEST_Unknown;
+    return FWL_WidgetHit::Unknown;
 
   hWidget->Rotate2Normal(fx, fy);
   return hWidget->OnHitTest(fx, fy);