minidump: Change the ownership model

minidump/minidump_string_writer.cc

 // 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 65 matching lines @@
   iovecs.push_back(iov);
 
   return file_writer->WriteIoVec(&iovecs);
 }
 
 // Explicit template instantiation of the forms of MinidumpStringWriter<> used
 // as base classes.
 template class MinidumpStringWriter<MinidumpStringWriterUTF16Traits>;
 template class MinidumpStringWriter<MinidumpStringWriterUTF8Traits>;
 
+MinidumpUTF16StringWriter::~MinidumpUTF16StringWriter() {
+}
+
 void MinidumpUTF16StringWriter::SetUTF8(const std::string& string_utf8) {
   DCHECK_EQ(state(), kStateMutable);
 
   set_string(MinidumpWriterUtil::ConvertUTF8ToUTF16(string_utf8));
 }
 
+MinidumpUTF8StringWriter::~MinidumpUTF8StringWriter() {
+}
+
 }  // namespace internal
 }  // namespace crashpad