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

extensions/browser/api/storage/settings_test_util.cc

Index: extensions/browser/api/storage/settings_test_util.cc
diff --git a/extensions/browser/api/storage/settings_test_util.cc b/extensions/browser/api/storage/settings_test_util.cc
index 1a363fabfe778d054f0d9b6ba1ca3d8d8236985a..aaa9840382c6665b1cf8701767f8db3020f4f519 100644
--- a/extensions/browser/api/storage/settings_test_util.cc
+++ b/extensions/browser/api/storage/settings_test_util.cc
@@ -29,7 +29,7 @@ std::unique_ptr<base::Value> CreateKilobyte() {
 std::unique_ptr<base::Value> CreateMegabyte() {
   base::ListValue* megabyte = new base::ListValue();
   for (int i = 0; i < 1000; ++i) {
-    megabyte->Append(CreateKilobyte().release());
+    megabyte->Append(CreateKilobyte());
   }
   return std::unique_ptr<base::Value>(megabyte);
 }