The assumptions that OSR code is installed on {JSFunction} objects no
longer holds with TurboFan and hence {assertOptimized} can report a
different result dependeing on how OSR code is treated. This is working
as intended.

R=mythria@chromium.org

Review-Url: https://codereview.chromium.org/2453313002
Cr-Commit-Position: refs/heads/master@{#40624}