Issue 71980: Extensions code should use UTF-16 for user-visible Unicode strings

chrome/common/extensions/extension_unpacker.cc

 // Copyright (c) 2011 The Chromium 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 "chrome/common/extensions/extension_unpacker.h"
 
 #include <set>
 
 #include "base/file_util.h"
 #include "base/json/json_value_serializer.h"
@@ skipping 306 matching lines @@
   if (dir_name.empty()) {
     NOTREACHED();
     return false;
   }
   parsed_catalogs_->Set(dir_name, root.release());
 
   return true;
 }
 
 void ExtensionUnpacker::SetError(const std::string &error) {
-  error_message_ = error;
+  error_message_ = UTF8ToUTF16(error);
 }