With constant field tracking, we get more properties on instance. This
negatively affects the common scenario where objects are used as
module, i.e., they have large number of constant functions as properties.
In that case, we would transition the objects to dictionary mode.

Bug: v8:8361
Change-Id: If4831bd081f3c45be651e051e7375eb275d265b4
Reviewed-on: https://chromium-review.googlesource.com/c/1344110
Commit-Queue: Jaroslav Sevcik <jarin@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57707}