Convert FWL_ERR into an enum class.

xfa/fwl/theme/cfwl_monthcalendartp.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_monthcalendartp.h"
 
 #include "xfa/fde/tto/fde_textout.h"
 #include "xfa/fwl/basewidget/ifwl_monthcalendar.h"
@@ skipping 331 matching lines @@
     default: { bDefPro = TRUE; }
   }
   if (!bDefPro) {
     if (bDwordVal) {
       return &m_dwValue;
     }
     return &m_fValue;
   }
   return CFWL_WidgetTP::GetCapacity(pThemePart, dwCapacity);
 }
-FWL_ERR CFWL_MonthCalendarTP::Initialize() {
+FWL_Error CFWL_MonthCalendarTP::Initialize() {
   InitTTO();
   return CFWL_WidgetTP::Initialize();
 }
-FWL_ERR CFWL_MonthCalendarTP::Finalize() {
+FWL_Error CFWL_MonthCalendarTP::Finalize() {
   FinalizeTTO();
   return CFWL_WidgetTP::Finalize();
 }
 FX_BOOL CFWL_MonthCalendarTP::DrawTotalBK(CFWL_ThemeBackground* pParams,
                                           CFX_Matrix* pMatrix) {
   CFX_Path path;
   path.Create();
   CFX_RectF rtTotal(pParams->m_rtPart);
   path.AddRectangle(rtTotal.left, rtTotal.top, rtTotal.width, rtTotal.height);
   pParams->m_pGraphics->SaveGraphState();
@@ skipping 192 matching lines @@
   } else {
     m_pThemeData->clrCaption = ArgbEncode(0xff, 128, 128, 0);
     m_pThemeData->clrSeperator = ArgbEncode(0xff, 128, 128, 64);
     m_pThemeData->clrDatesHoverBK = ArgbEncode(0xff, 217, 220, 191);
     m_pThemeData->clrDatesSelectedBK = ArgbEncode(0xff, 204, 208, 183);
     m_pThemeData->clrDatesCircle = ArgbEncode(0xff, 128, 128, 0);
     m_pThemeData->clrToday = ArgbEncode(0xff, 0, 0, 0);
     m_pThemeData->clrBK = ArgbEncode(0xff, 255, 255, 255);
   }
 }