Remove raw base::DictionaryValue::Set in //extensions

extensions/utility/unpacker.cc

 // Copyright (c) 2012 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 "extensions/utility/unpacker.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <set>
@@ skipping 300 matching lines @@
   if (!extension_dir_.AppendRelativePath(message_path, &relative_path)) {
     NOTREACHED();
     return false;
   }
 
   std::string dir_name = relative_path.DirName().MaybeAsASCII();
   if (dir_name.empty()) {
     NOTREACHED();
     return false;
   }
-  parsed_catalogs_->Set(dir_name, root.release());
+  parsed_catalogs_->Set(dir_name, std::move(root));
 
   return true;
 }
 
 void Unpacker::SetError(const std::string& error) {
   SetUTF16Error(base::UTF8ToUTF16(error));
 }
 
 void Unpacker::SetUTF16Error(const base::string16& error) {
   error_message_ = error;
 }
 
 }  // namespace extensions