Make CPDF_Dictionary use unique pointers.

xfa/fxfa/app/xfa_fontmgr.cpp

Index: xfa/fxfa/app/xfa_fontmgr.cpp
diff --git a/xfa/fxfa/app/xfa_fontmgr.cpp b/xfa/fxfa/app/xfa_fontmgr.cpp
index ddac27d533e61624bf98de933e9bb1e86b8e4f62..857c1d53f775f77b1c4aa31533a1750df1393a03 100644
--- a/xfa/fxfa/app/xfa_fontmgr.cpp
+++ b/xfa/fxfa/app/xfa_fontmgr.cpp
@@ -1839,7 +1839,7 @@ CFGAS_GEFont* CXFA_PDFFontMgr::FindFont(const CFX_ByteString& strPsName,
   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;