Remove FWL_WGTHITTEST_* defines in favour of enum class.

xfa/fwl/lightwidget/cfwl_widget.h

 // 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
 
 #ifndef XFA_FWL_LIGHTWIDGET_CFWL_WIDGET_H_
 #define XFA_FWL_LIGHTWIDGET_CFWL_WIDGET_H_
 
 #include "xfa/fwl/core/cfwl_event.h"
@@ skipping 28 matching lines @@
   FWL_ERR ModifyStylesEx(uint32_t dwStylesExAdded, uint32_t dwStylesExRemoved);
   uint32_t GetStates();
   FWL_ERR SetStates(uint32_t dwStates, FX_BOOL bSet = TRUE);
   FWL_ERR SetPrivateData(void* module_id,
                          void* pData,
                          PD_CALLBACK_FREEDATA callback);
   void* GetPrivateData(void* module_id);
   FWL_ERR Update();
   FWL_ERR LockUpdate();
   FWL_ERR UnlockUpdate();
-  uint32_t HitTest(FX_FLOAT fx, FX_FLOAT fy);
+  FWL_WidgetHit HitTest(FX_FLOAT fx, FX_FLOAT fy);
   FWL_ERR TransformTo(CFWL_Widget* pWidget, FX_FLOAT& fx, FX_FLOAT& fy);
   FWL_ERR TransformTo(CFWL_Widget* pWidget, CFX_RectF& rt);
   FWL_ERR GetMatrix(CFX_Matrix& matrix, FX_BOOL bGlobal = FALSE);
   FWL_ERR SetMatrix(const CFX_Matrix& matrix);
   FWL_ERR DrawWidget(CFX_Graphics* pGraphics, const CFX_Matrix* pMatrix = NULL);
   IFWL_WidgetDelegate* SetDelegate(IFWL_WidgetDelegate* pDelegate);
   FWL_ERR Repaint(const CFX_RectF* pRect = NULL);
   FWL_ERR SetFocus(FX_BOOL bFocus);
   FWL_ERR SetGrab(FX_BOOL bSet);
   CFWL_Widget();
 
   void RegisterEventTarget(CFWL_Widget* pEventSource = NULL,
                            uint32_t dwFilter = FWL_EVENT_ALL_MASK);
   void DispatchEvent(CFWL_Event* pEvent);
   CFX_SizeF CalcTextSize(const CFX_WideString& wsText,
                          FX_BOOL bMultiLine = FALSE,
                          int32_t iLineWidth = -1);
   IFWL_Widget* m_pIface;
   IFWL_WidgetDelegate* m_pDelegate;
   CFWL_WidgetMgr* m_pWidgetMgr;
   CFWL_WidgetProperties* m_pProperties;
 
  protected:
   FWL_ERR Initialize(const CFWL_WidgetProperties* pProperties = NULL);
 };
 
 #endif  // XFA_FWL_LIGHTWIDGET_CFWL_WIDGET_H_