The size of parent function is not considered when taking decisions
on which functions to inline. This cl, includes the size of the
parent function to the cumulative count. 

Bug: 
Change-Id: Ib8f4ec684f8313f7c2e29237580bb3c0403930bd
Reviewed-on: https://chromium-review.googlesource.com/506205
Commit-Queue: Mythri Alle <mythria@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46789}