GitLab

+ Parameterized some more tests in NewTabPageTest
+ Add some tests for FeedNewTabPage on the header views

Bug: 860055
Change-Id: Ie86d67d4e852117eb4074db9c522bbc219d5d4dc
Reviewed-on: https://chromium-review.googlesource.com/1227178
Commit-Queue: Becky Zhou <huayinz@chromium.org>
Reviewed-by: Ted Choc <tedchoc@chromium.org>
Reviewed-by: Theresa <twellington@chromium.org>
Cr-Commit-Position: refs/heads/master@{#592910}