Make CPDF_Dictionary use unique pointers.

fpdfsdk/fpdfview.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 "public/fpdfview.h"
 
 #include <memory>
 #include <utility>
@@ skipping 1064 matching lines @@
 
     pdfium::base::CheckedNumeric<int> checked_count = count;
     checked_count += pDest->GetCount();
     if (!checked_count.IsValid() || index >= checked_count.ValueOrDie())
       return nullptr;
 
     index -= count;
     int i = 0;
     for (const auto& it : *pDest) {
       bsName = it.first;
-      pDestObj = it.second;
+      pDestObj = it.second.get();
       if (!pDestObj)
         continue;
       if (i == index)
         break;
       i++;
     }
   } else {
     pDestObj = nameTree.LookupValue(index, bsName);
   }
   if (!pDestObj)
@@ skipping 12 matching lines @@
   if (!buffer) {
     *buflen = len;
   } else if (*buflen >= len) {
     memcpy(buffer, utf16Name.c_str(), len);
     *buflen = len;
   } else {
     *buflen = -1;
   }
   return (FPDF_DEST)pDestObj;
 }