base::ListValue::Append cleanup: pass unique_ptr instead of the released pointer.

chrome/browser/ui/webui/extensions/extension_loader_handler.cc

Index: chrome/browser/ui/webui/extensions/extension_loader_handler.cc
diff --git a/chrome/browser/ui/webui/extensions/extension_loader_handler.cc b/chrome/browser/ui/webui/extensions/extension_loader_handler.cc
index b964b20b9210ef7f7341437091acf933e8c95a7e..7d86b4b09349d4d83fb6356faf40c22a73908a74 100644
--- a/chrome/browser/ui/webui/extensions/extension_loader_handler.cc
+++ b/chrome/browser/ui/webui/extensions/extension_loader_handler.cc
@@ -4,6 +4,8 @@
 
 #include "chrome/browser/ui/webui/extensions/extension_loader_handler.h"
 
+#include <utility>
+
 #include "base/bind.h"
 #include "base/files/file_util.h"
 #include "base/logging.h"
@@ -198,7 +200,7 @@ void ExtensionLoaderHandler::AddFailure(
                new base::StringValue(prettified_path.LossyDisplayName()));
   failure->Set("error", new base::StringValue(base::UTF8ToUTF16(error)));
   failure->Set("manifest", manifest_value.release());
-  failures_.Append(failure.release());
+  failures_.Append(std::move(failure));
 
   // Only notify the frontend if the frontend UI is ready.
   if (ui_ready_)