Port d941b52d

Original commit message:

    These new representations aren't used yet.

R=mvstanton@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com, mbrandy@us.ibm.com

BUG=
LOG=N

Review-Url: https://codereview.chromium.org/2246213004
Cr-Commit-Position: refs/heads/master@{#38664}