Make CPDF_Dictionary use unique pointers.

core/fpdfapi/font/cpdf_fontencoding.cpp

Index: core/fpdfapi/font/cpdf_fontencoding.cpp
diff --git a/core/fpdfapi/font/cpdf_fontencoding.cpp b/core/fpdfapi/font/cpdf_fontencoding.cpp
index da607e6aa8e404acf9dc20c8a1dd7b3149a8e380..1d13f840ee28972d2a57a1762144d155de96db26 100644
--- a/core/fpdfapi/font/cpdf_fontencoding.cpp
+++ b/core/fpdfapi/font/cpdf_fontencoding.cpp
@@ -1701,7 +1701,7 @@ CPDF_Object* CPDF_FontEncoding::Realize(CFX_WeakPtr<CFX_ByteStringPool> pPool) {
   }
   const uint16_t* pStandard =
       PDF_UnicodesForPredefinedCharSet(PDFFONT_ENCODING_WINANSI);
-  CPDF_Array* pDiff = new CPDF_Array;
+  auto pDiff = pdfium::MakeUnique<CPDF_Array>();
   for (int i = 0; i < 256; i++) {
     if (pStandard[i] == m_Unicodes[i])
       continue;
@@ -1711,8 +1711,8 @@ CPDF_Object* CPDF_FontEncoding::Realize(CFX_WeakPtr<CFX_ByteStringPool> pPool) {
   }
 
   CPDF_Dictionary* pDict = new CPDF_Dictionary(pPool);
-  pDict->SetNameFor("BaseEncoding", "WinAnsiEncoding");
-  pDict->SetFor("Differences", pDiff);
+  pDict->SetNewFor<CPDF_Name>("BaseEncoding", "WinAnsiEncoding");
+  pDict->SetFor("Differences", std::move(pDiff));
   return pDict;
 }