TimelinePanel: apply warning to the entry for JSFrame if it has deoptReason

Drive by fix: do not process CloseFrame for gc events.

BUG=373767

Review URL: https://codereview.chromium.org/282243002

git-svn-id: svn://svn.chromium.org/blink/trunk@174090 bbb929c8-8fbe-4397-9dbb-9b2b20218538