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

chrome/browser/ui/webui/settings/protocol_handlers_handler.cc

Index: chrome/browser/ui/webui/settings/protocol_handlers_handler.cc
diff --git a/chrome/browser/ui/webui/settings/protocol_handlers_handler.cc b/chrome/browser/ui/webui/settings/protocol_handlers_handler.cc
index 70d02e81591188a2711a1164a7ac2c02df8bf540..c851eb51e1356e54c40dd006b685bcc6d7396e9a 100644
--- a/chrome/browser/ui/webui/settings/protocol_handlers_handler.cc
+++ b/chrome/browser/ui/webui/settings/protocol_handlers_handler.cc
@@ -11,6 +11,7 @@
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/macros.h"
+#include "base/memory/ptr_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/values.h"
 #include "chrome/browser/chrome_notification_types.h"
@@ -99,9 +100,10 @@ void ProtocolHandlersHandler::GetHandlersForProtocol(
   handlers_value->SetBoolean("has_policy_recommendations",
                              registry->HasPolicyRegisteredHandler(protocol));
 
-  base::ListValue* handlers_list = new base::ListValue();
-  GetHandlersAsListValue(registry->GetHandlersFor(protocol), handlers_list);
-  handlers_value->Set("handlers", handlers_list);
+  auto handlers_list = base::MakeUnique<base::ListValue>();
+  GetHandlersAsListValue(registry->GetHandlersFor(protocol),
+                         handlers_list.get());
+  handlers_value->Set("handlers", std::move(handlers_list));
 }
 
 void ProtocolHandlersHandler::GetIgnoredHandlers(base::ListValue* handlers) {