[ios] Modifies ChromeTestCase to inherit from BaseEarlGreyTestCase.

BUG=922813

Change-Id: If16aeb9020ccca4c7d79e9519934bf163906a4ef
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1628831
Reviewed-by: Eugene But <eugenebut@chromium.org>
Commit-Queue: Rohit Rao <rohitrao@chromium.org>
Cr-Commit-Position: refs/heads/master@{#663174}
3 files changed