Make CPDF_Dictionary use unique pointers.

xfa/fxfa/app/xfa_fontmgr.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/fxfa/xfa_fontmgr.h"
 
 #include <algorithm>
 #include <memory>
@@ skipping 1821 matching lines @@
   }
   pFontSetDict = pFontSetDict->GetDictFor("Font");
   if (!pFontSetDict) {
     return nullptr;
   }
   CFX_ByteString name = strPsName;
   name.Remove(' ');
   CFGAS_FontMgr* pFDEFontMgr = m_pDoc->GetApp()->GetFDEFontMgr();
   for (const auto& it : *pFontSetDict) {
     const CFX_ByteString& key = it.first;
-    CPDF_Object* pObj = it.second;
+    CPDF_Object* pObj = it.second.get();
     if (!PsNameMatchDRFontName(name.AsStringC(), bBold, bItalic, key,
                                bStrictMatch)) {
       continue;
     }
     CPDF_Dictionary* pFontDict = ToDictionary(pObj->GetDirect());
     if (!pFontDict || pFontDict->GetStringFor("Type") != "Font") {
       return nullptr;
     }
     CPDF_Font* pPDFFont = pDoc->LoadFont(pFontDict);
     if (!pPDFFont) {
@@ skipping 197 matching lines @@
     m_PDFFontMgrMap[hDoc].reset(new CXFA_PDFFontMgr(hDoc));
 }
 
 void CXFA_FontMgr::ReleaseDocFonts(CXFA_FFDoc* hDoc) {
   m_PDFFontMgrMap.erase(hDoc);
 }
 
 void CXFA_FontMgr::SetDefFontMgr(std::unique_ptr<CXFA_DefFontMgr> pFontMgr) {
   m_pDefFontMgr = std::move(pFontMgr);
 }