Revert "Modify supercluster multiplier logic" (http://crrev.com/231663006).

Appears to be causing crashes on Android perf bots.

BUG=362975
TBR=pdr@chromium.org

Review URL: https://codereview.chromium.org/235993003

git-svn-id: svn://svn.chromium.org/blink/trunk@171409 bbb929c8-8fbe-4397-9dbb-9b2b20218538