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 - Update reproduce.sh as necessary.
 - Add python script to minify Polymer 2 since it does not come minified from
   bower, unlike Polymer 1. Minified version is 135kb (pre-gzip), which is
   smaller than Polymer 1 (220kb).
 - grd files will be modified in follow up CLs, along with the addition of the
   runtime flag.

Bug: 862472
Cq-Include-Trybots: luci.chromium.try:closure_compilation
Change-Id: Ia2d084e9ee37c419175831ff64694f47ea277bba
Reviewed-on: https://chromium-review.googlesource.com/1132478
Commit-Queue: Demetrios Papadopoulos <dpapad@chromium.org>
Reviewed-by: Michael Giuffrida <michaelpg@chromium.org>
Cr-Commit-Position: refs/heads/master@{#575134}