This function was only used in one place and its name was confusing
because it was fundamentally different from the other Serialize
functions.

Bug: v8:7790
Change-Id: I2af384e41ecc2d97e644e6797a4200e00e840b23
Reviewed-on: https://chromium-review.googlesource.com/1230099
Commit-Queue: Georg Neis <neis@chromium.org>
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Reviewed-by: Maya Lekova <mslekova@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55997}