Remove raw DictionaryValue::Set in //chrome

chrome/browser/speech/extension_api/tts_extension_api.cc

Index: chrome/browser/speech/extension_api/tts_extension_api.cc
diff --git a/chrome/browser/speech/extension_api/tts_extension_api.cc b/chrome/browser/speech/extension_api/tts_extension_api.cc
index bfaf3526e746dc629b3dece13a40d7eeb56ab1e2..d8de59d92123386dd222f946f5869ac932db42a0 100644
--- a/chrome/browser/speech/extension_api/tts_extension_api.cc
+++ b/chrome/browser/speech/extension_api/tts_extension_api.cc
@@ -319,7 +319,7 @@ ExtensionFunction::ResponseAction TtsGetVoicesFunction::Run() {
   std::vector<VoiceData> voices;
   TtsController::GetInstance()->GetVoices(browser_context(), &voices);
 
-  std::unique_ptr<base::ListValue> result_voices(new base::ListValue());
+  auto result_voices = base::MakeUnique<base::ListValue>();
   for (size_t i = 0; i < voices.size(); ++i) {
     const VoiceData& voice = voices[i];
     std::unique_ptr<base::DictionaryValue> result_voice(
@@ -335,13 +335,13 @@ ExtensionFunction::ResponseAction TtsGetVoicesFunction::Run() {
     if (!voice.extension_id.empty())
       result_voice->SetString(constants::kExtensionIdKey, voice.extension_id);
 
-    base::ListValue* event_types = new base::ListValue();
+    auto event_types = base::MakeUnique<base::ListValue>();
     for (std::set<TtsEventType>::iterator iter = voice.events.begin();
          iter != voice.events.end(); ++iter) {
       const char* event_name_constant = TtsEventTypeToString(*iter);
       event_types->AppendString(event_name_constant);
     }
-    result_voice->Set(constants::kEventTypesKey, event_types);
+    result_voice->Set(constants::kEventTypesKey, std::move(event_types));
 
     result_voices->Append(std::move(result_voice));
   }