Replace std::unique_ptr.reset() with WrapUnique assignment.

fpdfsdk/formfiller/cffl_listbox.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/formfiller/cffl_listbox.h"
 
 #include "fpdfsdk/formfiller/cba_fontmap.h"
 #include "fpdfsdk/formfiller/cffl_formfiller.h"
@@ skipping 17 matching lines @@
 
   if (dwFieldFlag & FIELDFLAG_MULTISELECT) {
     cp.dwFlags |= PLBS_MULTIPLESEL;
   }
 
   cp.dwFlags |= PWS_VSCROLL;
 
   if (cp.dwFlags & PWS_AUTOFONTSIZE)
     cp.fFontSize = FFL_DEFAULTLISTBOXFONTSIZE;
 
-  if (!m_pFontMap)
-    m_pFontMap.reset(new CBA_FontMap(m_pWidget, m_pEnv->GetSysHandler()));
+  if (!m_pFontMap) {
+    m_pFontMap =
+        WrapUnique(new CBA_FontMap(m_pWidget, m_pEnv->GetSysHandler()));
+  }
   cp.pFontMap = m_pFontMap.get();
 
   return cp;
 }
 
 CPWL_Wnd* CFFL_ListBox::NewPDFWindow(const PWL_CREATEPARAM& cp,
                                      CPDFSDK_PageView* pPageView) {
   CPWL_ListBox* pWnd = new CPWL_ListBox();
   pWnd->AttachFFLData(this);
   pWnd->Create(cp);
@@ skipping 146 matching lines @@
     RestoreState(pPageView);
     pRet = GetPDFWindow(pPageView, FALSE);
   } else {
     pRet = GetPDFWindow(pPageView, TRUE);
   }
 
   m_pWidget->UpdateField();
 
   return pRet;
 }