Remove FWL_WGTHITTEST_* defines in favour of enum class.

xfa/fxfa/app/xfa_ffwidgethandler.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/fxfa/include/xfa_ffwidgethandler.h"
 
 #include <vector>
 
@@ skipping 142 matching lines @@
 }
 
 FX_BOOL CXFA_FFWidgetHandler::OnChar(CXFA_FFWidget* hWidget,
                                      uint32_t dwChar,
                                      uint32_t dwFlags) {
   FX_BOOL bRet = hWidget->OnChar(dwChar, dwFlags);
   m_pDocView->RunInvalidate();
   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);
 }
 
 FX_BOOL CXFA_FFWidgetHandler::OnSetCursor(CXFA_FFWidget* hWidget,
                                           FX_FLOAT fx,
                                           FX_FLOAT fy) {
   hWidget->Rotate2Normal(fx, fy);
   return hWidget->OnSetCursor(fx, fy);
@@ skipping 368 matching lines @@
 }
 
 CXFA_Document* CXFA_FFWidgetHandler::GetObjFactory() const {
   return GetXFADoc()->GetParser()->GetFactory();
 }
 
 CXFA_Document* CXFA_FFWidgetHandler::GetXFADoc() const {
   return ((CXFA_FFDoc*)(m_pDocView->GetDoc()))->GetXFADoc();
 }