There's no reason to keep track, for a preparsed function itself,
whether that function calls eval. All that matters is that the ancestor
scopes are marked as having an inner scope which calls eval. The function
will have its "calls eval" bit persisted if/when it's fully parsed.

The only "behavioral" change in this patch is the removal of a DCHECK.

Bug: v8:6092
Change-Id: I17e396c8a265030fe0ad941707e4a97972e6650b
Reviewed-on: https://chromium-review.googlesource.com/481223
Commit-Queue: Adam Klein <adamk@chromium.org>
Reviewed-by: Marja Hölttä <marja@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44732}