Port fba4cdf1

Original Commit Message:

    This patch breaks out bailout reasons into two enum classes.

    This helps save 3 bits on the SharedFunctionInfo as we don't have to
    track the abort reasons.

R=gsathya@chromium.org, joransiu@ca.ibm.com, michael_dawson@ca.ibm.com
BUG=
LOG=N

Change-Id: Ib2b2ce10b2f1ef6380193964aa9d868168fe129a
Reviewed-on: https://chromium-review.googlesource.com/855016Reviewed-by: Joran Siu <joransiu@ca.ibm.com>
Commit-Queue: Junliang Yan <jyan@ca.ibm.com>
Cr-Commit-Position: refs/heads/master@{#50419}