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Add an end-to-end test as a browser test as at this moment it is
difficult to write it as a web platform test. We will covert it into
a web platform test in the future.

Bug: 1011392
Change-Id: I90e95f265b788042bc21a3cf633849d6ea873c28
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2010740Reviewed-by: Victor Vasiliev <vasilvv@chromium.org>
Reviewed-by: Kinuko Yasuda <kinuko@chromium.org>
Reviewed-by: Adam Rice <ricea@chromium.org>
Commit-Queue: Yutaka Hirano <yhirano@chromium.org>
Cr-Commit-Position: refs/heads/master@{#734313}