Fix mac after https://codereview.chromium.org/1419623003/

minidump/minidump_handle_writer.cc

 // Copyright 2015 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 32 matching lines @@
     MINIDUMP_HANDLE_DESCRIPTOR& descriptor = handle_descriptors_[i];
 
     descriptor.Handle = handle_snapshot.handle;
 
     if (handle_snapshot.type_name.empty()) {
       descriptor.TypeNameRva = 0;
     } else {
       // TODO(scottmg): There is often a number of repeated type names here, the
       // strings ought to be pooled.
       strings_.push_back(new internal::MinidumpUTF16StringWriter());
-      strings_.back()->SetUTF16(handle_snapshot.type_name);
+      strings_.back()->SetUTF8(handle_snapshot.type_name);
       strings_.back()->RegisterRVA(&descriptor.TypeNameRva);
     }
 
     descriptor.ObjectNameRva = 0;
     descriptor.Attributes = handle_snapshot.attributes;
     descriptor.GrantedAccess = handle_snapshot.granted_access;
     descriptor.HandleCount = handle_snapshot.handle_count;
     descriptor.PointerCount = handle_snapshot.pointer_count;
   }
 }
@@ skipping 42 matching lines @@
   }
 
   return file_writer->WriteIoVec(&iovecs);
 }
 
 MinidumpStreamType MinidumpHandleDataWriter::StreamType() const {
   return kMinidumpStreamTypeHandleData;
 }
 
 }  // namespace crashpad