Merge to XFA: Switch from nonstd::unique_ptr to std::unique_ptr.

xfa/src/fwl/src/basewidget/include/fwl_datetimepickerimp.h

Index: xfa/src/fwl/src/basewidget/include/fwl_datetimepickerimp.h
diff --git a/xfa/src/fwl/src/basewidget/include/fwl_datetimepickerimp.h b/xfa/src/fwl/src/basewidget/include/fwl_datetimepickerimp.h
index 118d11ff1796361b7e891ba285ec19062998fcf8..1fc82fb281c235aa99ccbd34210a095030860b24 100644
--- a/xfa/src/fwl/src/basewidget/include/fwl_datetimepickerimp.h
+++ b/xfa/src/fwl/src/basewidget/include/fwl_datetimepickerimp.h
@@ -7,7 +7,7 @@
 #ifndef _FWL_DATETIMEPICKER_IMP_H
 #define _FWL_DATETIMEPICKER_IMP_H
 
-#include "third_party/base/nonstd_unique_ptr.h"
+#include <memory>
 
 class CFWL_WidgetImp;
 class CFWL_WidgetImpProperties;
@@ -180,9 +180,9 @@ class CFWL_DateTimePickerImp : public CFWL_WidgetImp {
   int32_t m_iMonth;
   int32_t m_iDay;
   FX_BOOL m_bLBtnDown;
-  nonstd::unique_ptr<IFWL_DateTimeEdit> m_pEdit;
-  nonstd::unique_ptr<IFWL_DateTimeCalender> m_pMonthCal;
-  nonstd::unique_ptr<IFWL_DateTimeForm> m_pForm;
+  std::unique_ptr<IFWL_DateTimeEdit> m_pEdit;
+  std::unique_ptr<IFWL_DateTimeCalender> m_pMonthCal;
+  std::unique_ptr<IFWL_DateTimeForm> m_pForm;
   FX_FLOAT m_fBtn;
   class CFWL_MonthCalendarImpDP : public IFWL_MonthCalendarDP {
    public: