Convert FWL_ERR into an enum class.

xfa/fwl/theme/cfwl_pushbuttontp.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_pushbuttontp.h"
 
 #include "xfa/fwl/basewidget/ifwl_pushbutton.h"
 #include "xfa/fwl/core/cfwl_themebackground.h"
@@ skipping 84 matching lines @@
   return TRUE;
 }
 void* CFWL_PushButtonTP::GetCapacity(CFWL_ThemePart* pThemePart,
                                      CFWL_WidgetCapacity dwCapacity) {
   if (dwCapacity == CFWL_WidgetCapacity::Margin) {
     m_fValue = 0;
     return &m_fValue;
   }
   return CFWL_WidgetTP::GetCapacity(pThemePart, dwCapacity);
 }
-FWL_ERR CFWL_PushButtonTP::Initialize() {
+FWL_Error CFWL_PushButtonTP::Initialize() {
   InitTTO();
   return CFWL_WidgetTP::Initialize();
 }
-FWL_ERR CFWL_PushButtonTP::Finalize() {
+FWL_Error CFWL_PushButtonTP::Finalize() {
   FinalizeTTO();
   return CFWL_WidgetTP::Finalize();
 }
 void CFWL_PushButtonTP::SetThemeData(uint32_t dwID) {
   if (dwID) {
     m_pThemeData->clrBorder[0] = ArgbEncode(255, 55, 98, 6);
     m_pThemeData->clrBorder[1] = ArgbEncode(255, 55, 98, 6);
     m_pThemeData->clrBorder[2] = ArgbEncode(255, 55, 98, 6);
     m_pThemeData->clrBorder[3] = ArgbEncode(255, 55, 98, 6);
     m_pThemeData->clrBorder[4] = ArgbEncode(255, 172, 168, 153);
@@ skipping 42 matching lines @@
   if (dwStates & CFWL_PartState_Default) {
     color += 3;
   } else {
     if (dwStates & CFWL_PartState_Hovered)
       color += 2;
     if (dwStates & CFWL_PartState_Pressed)
       color += 1;
   }
   return color;
 }