Add integration tests for link-rel canonical sharing.

BUG=780139

Change-Id: I7260239880be24a28868b0d08cf33658e5a2f0b4
Reviewed-on: https://chromium-review.googlesource.com/767592
Reviewed-by: Wei-Yin Chen (陳威尹) <wychen@chromium.org>
Commit-Queue: Ted Choc <tedchoc@chromium.org>
Cr-Commit-Position: refs/heads/master@{#516185}
7 files changed