GitLab

Need to double escape backslashes, since the JS parser parses the string
before the Polymer bindings parser kicks in.

Fixed: 1063530
Change-Id: I3a61824703cd5826920e347c82468d1ddf764cac
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2117162Reviewed-by: Rebekah Potter <rbpotter@chromium.org>
Commit-Queue: dpapad <dpapad@chromium.org>
Cr-Commit-Position: refs/heads/master@{#756424}