Add integration test for loading about://newtab.

This test simulates loading NTP and quickly navigating to a page. The
test does not use ios/chrome concepts and operates on ios/web
abstraction level.

Bug: 899827
Change-Id: Ifb6f86e32a927557716bc990a2350ae9b30bfd13
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1525188
Commit-Queue: Eugene But <eugenebut@chromium.org>
Auto-Submit: Eugene But <eugenebut@chromium.org>
Reviewed-by: Justin Cohen <justincohen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#641228}
1 file changed