Remove use of deprecated base::ListValue::Append(Value*) overload in extensions.

chrome/browser/extensions/api/font_settings/font_settings_api.cc

Index: chrome/browser/extensions/api/font_settings/font_settings_api.cc
diff --git a/chrome/browser/extensions/api/font_settings/font_settings_api.cc b/chrome/browser/extensions/api/font_settings/font_settings_api.cc
index 1cc64ddb454429bbb61e6eda2c953a87ab44b4d7..9d60a6ce23c17cbc85c144732b94ad0bb59283a1 100644
--- a/chrome/browser/extensions/api/font_settings/font_settings_api.cc
+++ b/chrome/browser/extensions/api/font_settings/font_settings_api.cc
@@ -180,11 +180,11 @@ void FontSettingsEventRouter::OnFontNamePrefChanged(
   font_name = MaybeGetLocalizedFontName(font_name);
 
   base::ListValue args;
-  base::DictionaryValue* dict = new base::DictionaryValue();
-  args.Append(dict);
+  std::unique_ptr<base::DictionaryValue> dict(new base::DictionaryValue());
   dict->SetString(kFontIdKey, font_name);
   dict->SetString(kGenericFamilyKey, generic_family);
   dict->SetString(kScriptKey, script);
+  args.Append(std::move(dict));
 
   extensions::preference_helpers::DispatchEventToExtensions(
       profile_, events::FONT_SETTINGS_ON_FONT_CHANGED,
@@ -202,9 +202,9 @@ void FontSettingsEventRouter::OnFontPrefChanged(
   CHECK(pref);
 
   base::ListValue args;
-  base::DictionaryValue* dict = new base::DictionaryValue();
-  args.Append(dict);
+  std::unique_ptr<base::DictionaryValue> dict(new base::DictionaryValue());
   dict->Set(key, pref->GetValue()->DeepCopy());
+  args.Append(std::move(dict));
 
   extensions::preference_helpers::DispatchEventToExtensions(
       profile_, histogram_value, event_name, &args,