Make down-conversion explicit from CFX_ByteString to CFX_ByteStringC.

core/fpdfapi/fpdf_parser/cpdf_object_unittest.cpp

 // Copyright 2016 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.
 
 #include "core/fpdfapi/fpdf_parser/cpdf_boolean.h"
 #include "core/fpdfapi/fpdf_parser/cpdf_null.h"
 #include "core/fpdfapi/fpdf_parser/include/cpdf_array.h"
 #include "core/fpdfapi/fpdf_parser/include/cpdf_dictionary.h"
 #include "core/fpdfapi/fpdf_parser/include/cpdf_name.h"
 #include "core/fpdfapi/fpdf_parser/include/cpdf_number.h"
@@ skipping 117 matching lines @@
         }
         return true;
       }
       case CPDF_Object::DICTIONARY: {
         const CPDF_Dictionary* dict1 = obj1->AsDictionary();
         const CPDF_Dictionary* dict2 = obj2->AsDictionary();
         if (dict1->GetCount() != dict2->GetCount())
           return false;
         for (CPDF_Dictionary::const_iterator it = dict1->begin();
              it != dict1->end(); ++it) {
-          if (!Equal(it->second, dict2->GetObjectBy(it->first)))
+          if (!Equal(it->second, dict2->GetObjectBy(it->first.AsByteStringC())))
             return false;
         }
         return true;
       }
       case CPDF_Object::NULLOBJ:
         return true;
       case CPDF_Object::STREAM: {
         const CPDF_Stream* stream1 = obj1->AsStream();
         const CPDF_Stream* stream2 = obj2->AsStream();
         if (!stream1->GetDict() && !stream2->GetDict())
@@ skipping 618 matching lines @@
   EXPECT_EQ(arr->GetCount(), arr1->GetCount());
   for (size_t i = 0; i < arr->GetCount(); ++i) {
     EXPECT_EQ(CPDF_Object::REFERENCE, arr->GetObjectAt(i)->GetType());
     EXPECT_EQ(indirect_objs[i], arr->GetObjectAt(i)->GetDirect());
     EXPECT_EQ(indirect_objs[i], arr->GetDirectObjectAt(i));
     EXPECT_EQ(CPDF_Object::REFERENCE, arr1->GetObjectAt(i)->GetType());
     EXPECT_EQ(indirect_objs[i], arr1->GetObjectAt(i)->GetDirect());
     EXPECT_EQ(indirect_objs[i], arr1->GetDirectObjectAt(i));
   }
 }