- Add parseString and parseVarArgs helper constants
- Fix number formatting in parser-processor.js
- Rename time to duration in parse-processor
- Fix eval handling in parse-processor

Bug: chromium:757467, chromium:850038

Change-Id: Ibce57b46d22e03ddaa5baa22f45d8df4c93af2cd
Reviewed-on: https://chromium-review.googlesource.com/1102435Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Commit-Queue: Camillo Bruni <cbruni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#53887}