GitLab

The following elements are only used in ChromeOS, so they don't have
to be included in non-ChromeOS builds

 - iron-input
 - paper-input-container
 - paper-icon-item

Bug:843350,899982

Change-Id: I376e811a6b53fca71ea5a14df479c6f958632547
Reviewed-on: https://chromium-review.googlesource.com/c/1336189Reviewed-by: Rebekah Potter <rbpotter@chromium.org>
Commit-Queue: Demetrios Papadopoulos <dpapad@chromium.org>
Cr-Commit-Position: refs/heads/master@{#608206}