[ios] Remove AccountTrackerService references from SignOutAndClearAccounts

SigninManager::SignOutandRemoveAllAccounts() always pass kRemoveAllAccounts
for the action, while SigninManager::SignOut() checks accounts_consistency_.
If the consistency method is kDice, then it passes kRemoveAuthenticatedAccountIfInError,
otherwise it uses kRemoveAllAccounts. Given that in iOS the account consistency
is always set to kMirror, kRemoveAllAccounts is always used and
SigninManager::SignOutandRemoveAllAccounts and SigninManager::SignOut() become
equivalent.

This CL removes the AccountTrackerService::RemoveAccount calls in
chrome_test_util::SignOutAndClearAccounts [1], which are not needed.

[1] //ios/chrome/test/app/signin_test_util.mm.

BUG=910146

Change-Id: Ia598d4eb2a1aa790a868e19b7163a38b1f03acf1
Reviewed-on: https://chromium-review.googlesource.com/c/1393367
Commit-Queue: Antonio Gomes <tonikitoo@igalia.com>
Reviewed-by: David Roger <droger@chromium.org>
Reviewed-by: Mihai Sardarescu <msarda@chromium.org>
Cr-Commit-Position: refs/heads/master@{#620825}
1 file changed