Remove ListValue::Append(new {Fundamental,String}Value(...)) pattern in //chrome

chrome/browser/speech/extension_api/tts_extension_api.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 "chrome/browser/speech/extension_api/tts_extension_api.h"
 
 #include <stddef.h>
 #include <string>
 #include <utility>
 
@@ skipping 319 matching lines @@
       result_voice->SetString(constants::kGenderKey, constants::kGenderMale);
     else if (voice.gender == TTS_GENDER_FEMALE)
       result_voice->SetString(constants::kGenderKey, constants::kGenderFemale);
     if (!voice.extension_id.empty())
       result_voice->SetString(constants::kExtensionIdKey, voice.extension_id);
 
     base::ListValue* event_types = new 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->Append(new base::StringValue(event_name_constant));
+      event_types->AppendString(event_name_constant);
     }
     result_voice->Set(constants::kEventTypesKey, event_types);
 
     result_voices->Append(result_voice);
   }
 
   SetResult(std::move(result_voices));
   return true;
 }
 
@@ skipping 16 matching lines @@
 }
 
 static base::LazyInstance<BrowserContextKeyedAPIFactory<TtsAPI> > g_factory =
     LAZY_INSTANCE_INITIALIZER;
 
 BrowserContextKeyedAPIFactory<TtsAPI>* TtsAPI::GetFactoryInstance() {
   return g_factory.Pointer();
 }
 
 }  // namespace extensions