Remove FWL_WGTHITTEST_* defines in favour of enum class.

xfa/fxfa/app/xfa_fffield.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_FXFA_APP_XFA_FFFIELD_H_
 #define XFA_FXFA_APP_XFA_FFFIELD_H_
 
 #include "xfa/fwl/core/fwl_sdadapterimp.h"
@@ skipping 35 matching lines @@
                                FX_FLOAT fy);
   virtual FX_BOOL OnRButtonDown(uint32_t dwFlags, FX_FLOAT fx, FX_FLOAT fy);
   virtual FX_BOOL OnRButtonUp(uint32_t dwFlags, FX_FLOAT fx, FX_FLOAT fy);
   virtual FX_BOOL OnRButtonDblClk(uint32_t dwFlags, FX_FLOAT fx, FX_FLOAT fy);
 
   virtual FX_BOOL OnSetFocus(CXFA_FFWidget* pOldWidget);
   virtual FX_BOOL OnKillFocus(CXFA_FFWidget* pNewWidget);
   virtual FX_BOOL OnKeyDown(uint32_t dwKeyCode, uint32_t dwFlags);
   virtual FX_BOOL OnKeyUp(uint32_t dwKeyCode, uint32_t dwFlags);
   virtual FX_BOOL OnChar(uint32_t dwChar, uint32_t dwFlags);
-  virtual uint32_t OnHitTest(FX_FLOAT fx, FX_FLOAT fy);
+  virtual FWL_WidgetHit OnHitTest(FX_FLOAT fx, FX_FLOAT fy);
   virtual FX_BOOL OnSetCursor(FX_FLOAT fx, FX_FLOAT fy);
 
  protected:
   virtual FX_BOOL PtInActiveRect(FX_FLOAT fx, FX_FLOAT fy);
   virtual void SetFWLRect();
   void SetFWLThemeProvider();
   CFWL_Widget* GetNormalWidget() { return m_pNormalWidget; }
   void FWLToClient(FX_FLOAT& fx, FX_FLOAT& fy);
   void LayoutCaption();
   void RenderCaption(CFX_Graphics* pGS, CFX_Matrix* pMatrix = NULL);
@@ skipping 24 matching lines @@
   virtual FWL_ERR OnDrawWidget(CFX_Graphics* pGraphics,
                                const CFX_Matrix* pMatrix = NULL);
 
  protected:
   CFWL_Widget* m_pNormalWidget;
   CFX_RectF m_rtUI;
   CFX_RectF m_rtCaption;
 };
 
 #endif  // XFA_FXFA_APP_XFA_FFFIELD_H_