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

chrome/browser/ui/webui/components_ui.cc

Index: chrome/browser/ui/webui/components_ui.cc
diff --git a/chrome/browser/ui/webui/components_ui.cc b/chrome/browser/ui/webui/components_ui.cc
index 2b716f5d6953be2e09b6e36f308d77358615a2a7..d815653ffc42925125f9655647d4e06bad03325a 100644
--- a/chrome/browser/ui/webui/components_ui.cc
+++ b/chrome/browser/ui/webui/components_ui.cc
@@ -104,9 +104,8 @@ void ComponentsDOMHandler::RegisterMessages() {
 
 void ComponentsDOMHandler::HandleRequestComponentsData(
     const base::ListValue* args) {
-  base::ListValue* list = ComponentsUI::LoadComponents();
   base::DictionaryValue result;
-  result.Set("components", list);
+  result.Set("components", ComponentsUI::LoadComponents());
   web_ui()->CallJavascriptFunctionUnsafe("returnComponentsData", result);
 }
 
@@ -164,14 +163,14 @@ void ComponentsUI::OnDemandUpdate(const std::string& component_id) {
 }
 
 // static
-base::ListValue* ComponentsUI::LoadComponents() {
+std::unique_ptr<base::ListValue> ComponentsUI::LoadComponents() {
   component_updater::ComponentUpdateService* cus =
       g_browser_process->component_updater();
   std::vector<std::string> component_ids;
   component_ids = cus->GetComponentIDs();
 
   // Construct DictionaryValues to return to UI.
-  base::ListValue* component_list = new base::ListValue();
+  auto component_list = base::MakeUnique<base::ListValue>();
   for (size_t j = 0; j < component_ids.size(); ++j) {
     update_client::CrxUpdateItem item;
     if (cus->GetComponentDetails(component_ids[j], &item)) {