Make CPDF_Dictionary use unique pointers.

fpdfsdk/fpdfxfa/cpdfxfa_docenvironment.cpp

 // Copyright 2016 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_docenvironment.h"
 
 #include "core/fpdfapi/parser/cpdf_array.h"
 #include "core/fpdfapi/parser/cpdf_stream_acc.h"
@@ skipping 380 matching lines @@
   wsTitle = wsTitle.FromLocal(csTitle.GetBuffer(csTitle.GetLength()));
   csTitle.ReleaseBuffer(csTitle.GetLength());
 }
 
 void CPDFXFA_DocEnvironment::SetTitle(CXFA_FFDoc* hDoc,
                                       const CFX_WideString& wsTitle) {
   if (hDoc != m_pContext->GetXFADoc() || !m_pContext->GetPDFDoc())
     return;
 
   if (CPDF_Dictionary* pInfoDict = m_pContext->GetPDFDoc()->GetInfo())
-    pInfoDict->SetFor("Title", new CPDF_String(wsTitle));
+    pInfoDict->SetNewFor<CPDF_String>("Title", wsTitle);
 }
 
 void CPDFXFA_DocEnvironment::ExportData(CXFA_FFDoc* hDoc,
                                         const CFX_WideString& wsFilePath,
                                         bool bXDP) {
   if (hDoc != m_pContext->GetXFADoc())
     return;
 
   if (m_pContext->GetDocType() != DOCTYPE_DYNAMIC_XFA &&
       m_pContext->GetDocType() != DOCTYPE_STATIC_XFA) {
@@ skipping 605 matching lines @@
       !m_pContext->GetFormFillEnv()->GetJSRuntime()) {
     return false;
   }
 
   CPDFSDK_FormFillEnvironment* pFormFillEnv = m_pContext->GetFormFillEnv();
   if (!m_pJSContext)
     m_pJSContext = pFormFillEnv->GetJSRuntime()->NewContext();
 
   return pFormFillEnv->GetJSRuntime()->GetValueByName(szPropName, pValue);
 }