Reland of Stop passing raw pointers to base::Value API in c/b/ui

chrome/browser/ui/webui/options/chromeos/keyboard_handler.cc

Index: chrome/browser/ui/webui/options/chromeos/keyboard_handler.cc
diff --git a/chrome/browser/ui/webui/options/chromeos/keyboard_handler.cc b/chrome/browser/ui/webui/options/chromeos/keyboard_handler.cc
index 4297e46b404ebe19bf27f16d17b31819f8fd131a..1d6882b886df6e242b87adbd6f68278223dfdb27 100644
--- a/chrome/browser/ui/webui/options/chromeos/keyboard_handler.cc
+++ b/chrome/browser/ui/webui/options/chromeos/keyboard_handler.cc
@@ -139,7 +139,7 @@ void KeyboardHandler::GetLocalizedValues(
           IDS_OPTIONS_SETTINGS_SHOW_KEYBOARD_SHORTCUTS));
 
   for (size_t i = 0; i < arraysize(kDataValuesNames); ++i) {
-    base::ListValue* list_value = new base::ListValue();
+    auto list_value = base::MakeUnique<base::ListValue>();
     for (size_t j = 0; j < arraysize(kModifierKeysSelectItems); ++j) {
       const input_method::ModifierKey value =
           kModifierKeysSelectItems[j].value;
@@ -149,7 +149,7 @@ void KeyboardHandler::GetLocalizedValues(
       option->AppendString(l10n_util::GetStringUTF16(message_id));
       list_value->Append(std::move(option));
     }
-    localized_strings->Set(kDataValuesNames[i], list_value);
+    localized_strings->Set(kDataValuesNames[i], std::move(list_value));
   }
 }