Fix all the code which has duplicate variable declarations

core/fpdfdoc/doc_annot.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 "core/fpdfapi/fpdf_page/include/cpdf_form.h"
 #include "core/fpdfapi/fpdf_page/include/cpdf_page.h"
 #include "core/fpdfapi/fpdf_parser/include/cpdf_array.h"
 #include "core/fpdfapi/fpdf_parser/include/cpdf_document.h"
@@ skipping 161 matching lines @@
   if (!psub)
     return nullptr;
   if (CPDF_Stream* pStream = psub->AsStream())
     return pStream;
 
   if (CPDF_Dictionary* pDict = psub->AsDictionary()) {
     CFX_ByteString as = pAnnotDict->GetStringBy("AS");
     if (as.IsEmpty()) {
       CFX_ByteString value = pAnnotDict->GetStringBy("V");
       if (value.IsEmpty()) {
-        CPDF_Dictionary* pDict = pAnnotDict->GetDictBy("Parent");
-        value = pDict ? pDict->GetStringBy("V") : CFX_ByteString();
+        CPDF_Dictionary* pParentDict = pAnnotDict->GetDictBy("Parent");
+        value = pParentDict ? pParentDict->GetStringBy("V") : CFX_ByteString();
       }
       if (value.IsEmpty() || !pDict->KeyExist(value))
         as = "Off";
       else
         as = value;
     }
     return pDict->GetStreamBy(as);
   }
   return nullptr;
 }
@@ skipping 154 matching lines @@
   CFX_PathData path;
   width /= 2;
   path.AppendRect(rect.left + width, rect.bottom + width, rect.right - width,
                   rect.top - width);
   int fill_type = 0;
   if (pOptions && (pOptions->m_Flags & RENDER_NOPATHSMOOTH)) {
     fill_type |= FXFILL_NOPATHSMOOTH;
   }
   pDevice->DrawPath(&path, pUser2Device, &graph_state, argb, argb, fill_type);
 }