Convert FWL_ERR into an enum class.

xfa/fxfa/app/xfa_ffimageedit.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/fxfa/app/xfa_ffimageedit.h"
 
 #include "xfa/fwl/core/cfwl_message.h"
 #include "xfa/fwl/core/fwl_noteimp.h"
@@ skipping 105 matching lines @@
   m_pNormalWidget->SetWidgetRect(rtImage);
 }
 FX_BOOL CXFA_FFImageEdit::CommitData() {
   return TRUE;
 }
 FX_BOOL CXFA_FFImageEdit::UpdateFWLData() {
   m_pDataAcc->SetImageEditImage(NULL);
   m_pDataAcc->LoadImageEditImage();
   return TRUE;
 }
-int32_t CXFA_FFImageEdit::OnProcessMessage(CFWL_Message* pMessage) {
-  return m_pOldDelegate->OnProcessMessage(pMessage);
+
+void CXFA_FFImageEdit::OnProcessMessage(CFWL_Message* pMessage) {
+  m_pOldDelegate->OnProcessMessage(pMessage);
 }
-FWL_ERR CXFA_FFImageEdit::OnProcessEvent(CFWL_Event* pEvent) {
+
+void CXFA_FFImageEdit::OnProcessEvent(CFWL_Event* pEvent) {
   CXFA_FFField::OnProcessEvent(pEvent);
-  return m_pOldDelegate->OnProcessEvent(pEvent);
+  m_pOldDelegate->OnProcessEvent(pEvent);
 }
-FWL_ERR CXFA_FFImageEdit::OnDrawWidget(CFX_Graphics* pGraphics,
-                                       const CFX_Matrix* pMatrix) {
-  return m_pOldDelegate->OnDrawWidget(pGraphics, pMatrix);
+
+void CXFA_FFImageEdit::OnDrawWidget(CFX_Graphics* pGraphics,
+                                    const CFX_Matrix* pMatrix) {
+  m_pOldDelegate->OnDrawWidget(pGraphics, pMatrix);
 }