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

chrome/browser/ui/webui/components_ui.h

Index: chrome/browser/ui/webui/components_ui.h
diff --git a/chrome/browser/ui/webui/components_ui.h b/chrome/browser/ui/webui/components_ui.h
index b12052bf01d7d2a1ab57432e43da54817170639f..4a4584e29a4d2357dbfc2bd5ffebc50d5819bf39 100644
--- a/chrome/browser/ui/webui/components_ui.h
+++ b/chrome/browser/ui/webui/components_ui.h
@@ -5,6 +5,7 @@
 #ifndef CHROME_BROWSER_UI_WEBUI_COMPONENTS_UI_H_
 #define CHROME_BROWSER_UI_WEBUI_COMPONENTS_UI_H_
 
+#include <memory>
 #include <string>
 
 #include "base/macros.h"
@@ -14,6 +15,7 @@
 #include "ui/base/layout.h"
 
 namespace base {
+class ListValue;
 class RefCountedMemory;
 }
 
@@ -25,7 +27,7 @@ class ComponentsUI : public content::WebUIController,
 
   static void OnDemandUpdate(const std::string& component_id);
 
-  static base::ListValue* LoadComponents();
+  static std::unique_ptr<base::ListValue> LoadComponents();
 
   static base::RefCountedMemory* GetFaviconResourceBytes(
       ui::ScaleFactor scale_factor);