Return unique_ptr from CXFA_FFApp::CreateDoc.

fpdfsdk/fpdfxfa/cpdfxfa_context.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/fpdfxfa/cpdfxfa_context.h"
 
 #include <utility>
 
@@ skipping 74 matching lines @@
 
   if (!m_pPDFDoc)
     return false;
 
   m_XFAPageList.RemoveAll();
 
   CXFA_FFApp* pApp = GetXFAApp();
   if (!pApp)
     return false;
 
-  m_pXFADoc.reset(pApp->CreateDoc(&m_DocEnv, m_pPDFDoc.get()));
+  m_pXFADoc = pApp->CreateDoc(&m_DocEnv, m_pPDFDoc.get());
   if (!m_pXFADoc) {
     SetLastError(FPDF_ERR_XFALOAD);
     return false;
   }
 
   CXFA_FFDocHandler* pDocHandler = pApp->GetDocHandler();
   if (!pDocHandler) {
     SetLastError(FPDF_ERR_XFALOAD);
     return false;
   }
@@ skipping 347 matching lines @@
       return;
   }
 }
 
 IFWL_AdapterTimerMgr* CPDFXFA_Context::GetTimerMgr() {
   CXFA_FWLAdapterTimerMgr* pAdapter = nullptr;
   if (m_pFormFillEnv)
     pAdapter = new CXFA_FWLAdapterTimerMgr(m_pFormFillEnv);
   return pAdapter;
 }