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I did a bit of a code search and could not find this being used anymore,
so removing it as per the suggested bug.

- Added an assert just in case it was being used and my code search
  skills were not good enough, so we can roll it back.
- Closure compile the unit tests while I am at it.

Bug: 700272
Change-Id: I5523bbff983fbad3be886319d17278e4673915e3
Reviewed-on: https://chromium-review.googlesource.com/c/1341433Reviewed-by: Luciano Pacheco <lucmult@chromium.org>
Commit-Queue: Stuart Langley <slangley@chromium.org>
Cr-Commit-Position: refs/heads/master@{#609179}