Currently in its own target, and simply dumps the output to a file without
checking

Bug: 863174
Test: out/Default/ntp_render_browsertests
Change-Id: I61ca7714005c3b1d40f354d9f2ca519750843108
Reviewed-on: https://chromium-review.googlesource.com/1135756Reviewed-by: Fernando Serboncini <fserb@chromium.org>
Commit-Queue: Mathieu Perreault <mathp@chromium.org>
Cr-Commit-Position: refs/heads/master@{#574897}