Fix broken Variable::IsGlobalObjectProperty() after https://codereview.chromium.org/1218783005
Fix broken Variable::IsGlobalObjectProperty() after https://codereview.chromium.org/1218783005

Review URL: https://codereview.chromium.org/1228373011

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#29682}

UniversalFuture/moosh,UniversalFuture/moosh,UniversalFuture/moosh,UniversalFuture/moosh