GitLab

- Added test method setups in |-appLaunchManagerDidRelaunchApp| in
|ChromeTestCase|, which will do resets and open a new tab after app is
relaunched. Introduced a flag in |ChromeTestCase| to prevent these
setups from called twice after one relaunch.

- Added in smoke test to test if new tab is opened after relaunch.

- Remove user's [ChromeEarlGrey openNewTab] call after calling
|ensureAppLaunchedWithFeaturesEnabled|.


Bug: 922813, 1004565
Change-Id: I525fb7492777fdd29b9491a2d6927b64fd58df7c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1835022
Commit-Queue: Zhaoyang Li <zhaoyangli@chromium.org>
Reviewed-by: Eugene But <eugenebut@chromium.org>
Cr-Commit-Position: refs/heads/master@{#702492}