GitLab

Add some polymer bindings to share the discovery page's SendPreview
with the confirmation page. This allows showing the correct filename
on the confirmation page, and also paves the way for using the
appropriate icon depending on the file type.

Bug: 1123942
Change-Id: Iff779c2fa681f85ff3fd7435cce3a38706ff5c57
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2493376
Commit-Queue: Curt Clemens <cclem@google.com>
Reviewed-by: Kyle Horimoto <khorimoto@chromium.org>
Cr-Commit-Position: refs/heads/master@{#820385}