Literals should stay together to simplify allocation folding. This CL takes the pretenuring information from the outermost literal and applies it to the inner liberals.

BUG=chromium:514721
LOG=n
R=mvstanton@chromium.org

Review URL: https://codereview.chromium.org/1263773002 .

Cr-Commit-Position: refs/heads/master@{#29903}