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This CL adds 3 browser tests for intent picker:
1. If the website call pushstate on page loaded, with same URL, the
intent picker should work as normal.
2. If call pushstate to a different URL, the intent picker should check
with the new URL and update the visibility status accordingly.
3. If we reload a page after install an app that can be handle by that
page, we should be able to see intent picker icon after reload.

BUG=853604

Change-Id: I8fe9f13b6d21e691f382fedcd4170729bc35c0c1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2546679Reviewed-by: Scott Violet <sky@chromium.org>
Commit-Queue: Maggie Cai <mxcai@chromium.org>
Cr-Commit-Position: refs/heads/master@{#828983}