Add browser tests for when we show the cookie exception

Depending on the sync / sign-in state.

BUG=890925
R=tangltom@chromium.org, msarda@chromium.org

Change-Id: I784f13a4981250f851df770d111a13969a6892a6
Reviewed-on: https://chromium-review.googlesource.com/c/1273521
Commit-Queue: Jochen Eisinger <jochen@chromium.org>
Reviewed-by: Mihai Sardarescu <msarda@chromium.org>
Cr-Commit-Position: refs/heads/master@{#599134}
2 files changed