win: convert MinidumpSimpleStringDictionaryWriter to scoped_ptr

minidump/minidump_simple_string_dictionary_writer.h

 // Copyright 2014 The Crashpad Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
 //
 //     http://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
@@ skipping 117 matching lines @@
 
   bool Freeze() override;
   size_t SizeOfObject() override;
   std::vector<MinidumpWritable*> Children() override;
   bool WriteObject(FileWriterInterface* file_writer) override;
 
  private:
   // This object owns the MinidumpSimpleStringDictionaryEntryWriter objects.
   std::map<std::string, MinidumpSimpleStringDictionaryEntryWriter*> entries_;
 
-  MinidumpSimpleStringDictionary simple_string_dictionary_base_;
+  scoped_ptr<MinidumpSimpleStringDictionary> simple_string_dictionary_base_;
 
   DISALLOW_COPY_AND_ASSIGN(MinidumpSimpleStringDictionaryWriter);
 };
 
 }  // namespace crashpad
 
 #endif  // CRASHPAD_MINIDUMP_MINIDUMP_SIMPLE_STRING_DICTIONARY_WRITER_H_