This makes sure that static guarantees about object maps are not used
accross operations on the effect chain that might trigger a map change.
Such operations are missing the {Operator::kNoWrite} property.

R=bmeurer@chromium.org
TEST=mjsunit/regress/regress-crbug-685506
BUG=chromium:685506

Review-Url: https://codereview.chromium.org/2653273004
Cr-Commit-Position: refs/heads/master@{#42697}