Remove FWL globals.

xfa/fwl/core/ifwl_datetimecalendar.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/core/ifwl_datetimecalendar.h"
 
 #include "xfa/fwl/core/cfwl_widgetmgr.h"
 #include "xfa/fwl/core/ifwl_datetimepicker.h"
 #include "xfa/fwl/core/ifwl_formproxy.h"
 
 IFWL_DateTimeCalendar::IFWL_DateTimeCalendar(
+    const IFWL_App* app,
     const CFWL_WidgetImpProperties& properties,
     IFWL_Widget* pOuter)
-    : IFWL_MonthCalendar(properties, pOuter) {}
+    : IFWL_MonthCalendar(app, properties, pOuter) {}
 
-FWL_Error IFWL_DateTimeCalendar::Initialize() {
-  if (IFWL_MonthCalendar::Initialize() != FWL_Error::Succeeded)
-    return FWL_Error::Indefinite;
+void IFWL_DateTimeCalendar::Initialize() {
+  IFWL_MonthCalendar::Initialize();
+
+  // Delete delegated set by IFWL_MonthCalendar::Initialize.
   delete m_pDelegate;
   m_pDelegate = new CFWL_DateTimeCalendarImpDelegate(this);
-  return FWL_Error::Succeeded;
 }
 
 void IFWL_DateTimeCalendar::Finalize() {
   delete m_pDelegate;
   m_pDelegate = nullptr;
   IFWL_MonthCalendar::Finalize();
 }
 
 CFWL_DateTimeCalendarImpDelegate::CFWL_DateTimeCalendarImpDelegate(
     IFWL_DateTimeCalendar* pOwner)
@@ skipping 172 matching lines @@
       rtInvalidate.Union(lpDatesInfo->rect);
     }
     m_pOwner->AddSelDay(iCurSel);
     IFWL_DateTimePicker* pDateTime =
         static_cast<IFWL_DateTimePicker*>(m_pOwner->m_pOuter);
     pDateTime->ProcessSelChanged(m_pOwner->m_iCurYear, m_pOwner->m_iCurMonth,
                                  iCurSel);
     pDateTime->ShowMonthCalendar(FALSE);
   }
 }