v8::Isolate::kAttemptOverrideReadOnlyOnPrototypeSloppy and
v8::Isolate::kAttemptOverrideReadOnlyOnPrototypeStrict are no longer
incremented.

BUG=v8:8175
R=gsathya@chromium.org, littledan@chromium.org

Change-Id: Ia5f8f9226a54d88c15a3c3b4a5941d774eb1834a
Reviewed-on: https://chromium-review.googlesource.com/c/1417381Reviewed-by: Sathya Gunasekaran <gsathya@chromium.org>
Commit-Queue: Caitlin Potter <caitp@igalia.com>
Cr-Commit-Position: refs/heads/master@{#58934}