Remove FWL_WGTHITTEST_* defines in favour of enum class.

xfa/fxfa/app/xfa_ffwidget.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_ffwidget.h"
 
 #include <algorithm>
 
@@ skipping 231 matching lines @@
 }
 FX_BOOL CXFA_FFWidget::OnKeyDown(uint32_t dwKeyCode, uint32_t dwFlags) {
   return FALSE;
 }
 FX_BOOL CXFA_FFWidget::OnKeyUp(uint32_t dwKeyCode, uint32_t dwFlags) {
   return FALSE;
 }
 FX_BOOL CXFA_FFWidget::OnChar(uint32_t dwChar, uint32_t dwFlags) {
   return FALSE;
 }
-uint32_t CXFA_FFWidget::OnHitTest(FX_FLOAT fx, FX_FLOAT fy) {
-  return FALSE;
+FWL_WidgetHit CXFA_FFWidget::OnHitTest(FX_FLOAT fx, FX_FLOAT fy) {
+  return FWL_WidgetHit::Unknown;
 }
 FX_BOOL CXFA_FFWidget::OnSetCursor(FX_FLOAT fx, FX_FLOAT fy) {
   return FALSE;
 }
 void CXFA_FFWidget::Rotate2Normal(FX_FLOAT& fx, FX_FLOAT& fy) {
   CFX_Matrix mt;
   GetRotateMatrix(mt);
   if (mt.IsIdentity()) {
     return;
   }
@@ skipping 1691 matching lines @@
       iType != XFA_ELEMENT_Rectangle) {
     return;
   }
   CXFA_StrokeArray strokes;
   if (!(dwFlags & XFA_DRAWBOX_ForceRound) && iType != XFA_ELEMENT_Arc) {
     box.GetStrokes(strokes);
   }
   XFA_BOX_Fill(box, strokes, pGS, rtWidget, pMatrix, dwFlags);
   XFA_BOX_Stroke(box, strokes, pGS, rtWidget, pMatrix, dwFlags);
 }