Re-enable MSVC warning 4800 for compiling with chromium_code

fpdfsdk/src/formfiller/FFL_CheckBox.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 "fpdfsdk/include/formfiller/FFL_CheckBox.h"
 
 #include "fpdfsdk/include/formfiller/FFL_FormFiller.h"
 #include "fpdfsdk/include/fsdk_mgr.h"
@@ skipping 78 matching lines @@
   return TRUE;
 }
 
 FX_BOOL CFFL_CheckBox::IsDataChanged(CPDFSDK_PageView* pPageView) {
   CPWL_CheckBox* pWnd = (CPWL_CheckBox*)GetPDFWindow(pPageView, FALSE);
   return pWnd && pWnd->IsChecked() != m_pWidget->IsChecked();
 }
 
 void CFFL_CheckBox::SaveData(CPDFSDK_PageView* pPageView) {
   if (CPWL_CheckBox* pWnd = (CPWL_CheckBox*)GetPDFWindow(pPageView, FALSE)) {
-    FX_BOOL bNewChecked = pWnd->IsChecked();
+    bool bNewChecked = pWnd->IsChecked();
 
     if (bNewChecked) {
       CPDF_FormField* pField = m_pWidget->GetFormField();
       for (int32_t i = 0, sz = pField->CountControls(); i < sz; i++) {
         if (CPDF_FormControl* pCtrl = pField->GetControl(i)) {
           if (pCtrl->IsChecked()) {
             break;
           }
         }
       }
     }
 
-    m_pWidget->SetCheck(bNewChecked, FALSE);
+    m_pWidget->SetCheck(bNewChecked, false);
     m_pWidget->UpdateField();
     SetChangeMark();
   }
 }