We have a check on maximum number of levels that can be inlined. This
in some cases causes performance cliffs, when we cannot inline a small
function because it has exceeded the number of levels. This cl removes
that check. The intuition is that, having gone down several levels in
a particular line stopping inlining that chain and exploring a new
call site may not be beneficial.

Bug: v8:6871
Change-Id: I120056db38e78ce48dff010b6cf994259238582a
Reviewed-on: https://chromium-review.googlesource.com/741705Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49009}