Convert FWL_ERR into an enum class.

xfa/fwl/theme/cfwl_checkboxtp.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/fwl/theme/cfwl_checkboxtp.h"
 
 #include "xfa/fde/tto/fde_textout.h"
 #include "xfa/fwl/basewidget/ifwl_checkbox.h"
@@ skipping 80 matching lines @@
       }
       DrawSignBorder(
           pParams->m_pWidget, pParams->m_pGraphics, &pParams->m_rtPart,
           pParams->m_dwStates & CFWL_PartState_Disabled, &pParams->m_matrix);
       break;
     }
     default: { return FALSE; }
   }
   return TRUE;
 }
-FWL_ERR CFWL_CheckBoxTP::Initialize() {
+FWL_Error CFWL_CheckBoxTP::Initialize() {
   InitTTO();
   return CFWL_WidgetTP::Initialize();
 }
-FWL_ERR CFWL_CheckBoxTP::Finalize() {
+FWL_Error CFWL_CheckBoxTP::Finalize() {
   FinalizeTTO();
   return CFWL_WidgetTP::Finalize();
 }
 void CFWL_CheckBoxTP::DrawBoxBk(IFWL_Widget* pWidget,
                                 CFX_Graphics* pGraphics,
                                 const CFX_RectF* pRect,
                                 uint32_t dwStates,
                                 CFX_Matrix* pMatrix) {
   dwStates &= 0x03;
   int32_t fillMode = FXFILL_WINDING;
@@ skipping 380 matching lines @@
                            pt1.x + px2 * FX_BEZIER, pt1.y + py2 * FX_BEZIER,
                            pt1.x, pt1.y);
     FX_FLOAT fScale = fCheckLen / kSignPath;
     CFX_Matrix mt;
     mt.Set(1, 0, 0, 1, 0, 0);
     mt.Scale(fScale, fScale);
     CFX_PathData* pData = m_pCheckPath->GetPathData();
     pData->Transform(&mt);
   }
 }