Rewrite simple uses of base::ListValue::Append(base::Value*) on CrOS.

chrome/browser/ui/webui/chromeos/login/user_image_screen_handler.cc

Index: chrome/browser/ui/webui/chromeos/login/user_image_screen_handler.cc
diff --git a/chrome/browser/ui/webui/chromeos/login/user_image_screen_handler.cc b/chrome/browser/ui/webui/chromeos/login/user_image_screen_handler.cc
index a6166daeb8d8dbd5d4888458807e9e3f603ec584..edb0aaf7ad57df70df39bf89815f713321f32299 100644
--- a/chrome/browser/ui/webui/chromeos/login/user_image_screen_handler.cc
+++ b/chrome/browser/ui/webui/chromeos/login/user_image_screen_handler.cc
@@ -4,6 +4,8 @@
 
 #include "chrome/browser/ui/webui/chromeos/login/user_image_screen_handler.h"
 
+#include <utility>
+
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/metrics/histogram_macros.h"
@@ -144,7 +146,7 @@ void UserImageScreenHandler::HandleGetImages() {
                               default_user_image::kDefaultImageWebsiteIDs[i]));
     image_data->SetString("title",
                           default_user_image::GetDefaultImageDescription(i));
-    image_urls.Append(image_data.release());
+    image_urls.Append(std::move(image_data));
   }
   CallJS("setDefaultImages", image_urls);
 }