base::ListValue::Append cleanup: pass unique_ptr instead of the released pointer.

chrome/browser/spellchecker/feedback_sender.cc

 // Copyright (c) 2013 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.
 //
 // The |FeedbackSender| object stores the user feedback to spellcheck
 // suggestions in a |Feedback| object.
 //
 // When spelling service returns spellcheck results, these results first arrive
 // in |FeedbackSender| to assign hash identifiers for each
 // misspelling-suggestion pair. If the spelling service identifies the same
@@ skipping 13 matching lines @@
 // |FeedbackSender| periodically requests a list of hashes of all remaining
 // misspellings in renderers. When a renderer responds with a list of hashes,
 // |FeedbackSender| uses the list to determine which misspellings are no longer
 // displayed to the user and sends the current state of user feedback to the
 // spelling service.
 
 #include "chrome/browser/spellchecker/feedback_sender.h"
 
 #include <algorithm>
 #include <iterator>
+#include <utility>
 
 #include "base/command_line.h"
 #include "base/hash.h"
 #include "base/json/json_writer.h"
 #include "base/location.h"
 #include "base/metrics/field_trial.h"
 #include "base/single_thread_task_runner.h"
 #include "base/stl_util.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/stringprintf.h"
@@ skipping 83 matching lines @@
         base::Uint64ToString(BuildAnonymousHash(
             salt, raw_misspelling.context.substr(raw_misspelling.location,
                                                  raw_misspelling.length))));
     // repeated fixed64 user_suggestion_id = ...
     std::unique_ptr<base::ListValue> suggestion_list(new base::ListValue());
     for (const auto& suggestion : raw_misspelling.suggestions) {
       suggestion_list->AppendString(
           base::Uint64ToString(BuildAnonymousHash(salt, suggestion)));
     }
     misspelling->Set("userSuggestionId", suggestion_list.release());
-    list->Append(misspelling.release());
+    list->Append(std::move(misspelling));
   }
   return list;
 }
 
 // Builds feedback parameters from |suggestion_info|, |language|, and |country|.
 // Takes ownership of |suggestion_list|.
 std::unique_ptr<base::DictionaryValue> BuildParams(
     std::unique_ptr<base::ListValue> suggestion_info,
     const std::string& language,
     const std::string& country) {
@@ skipping 306 matching lines @@
   senders_.push_back(sender);
 
   // Request context is nullptr in testing.
   if (request_context_.get()) {
     sender->SetRequestContext(request_context_.get());
     sender->Start();
   }
 }
 
 }  // namespace spellcheck