GitLab

Change internal implementation of two methods of AuthenticationService
to remove unnecessary allocations.

1.  AuthenticationService::MigrateAccountsStoredInPrefsIfNeeded is
    only interested in whether the system has stored refresh token
    for an account by account_id, so use HasAccountWithRefreshToken
    instead of fetching the whole AccountInfo

2.  AuthenticationService::ReloadCredentialsFromIdentities only need
    to check whether the system has a primary account set, and is not
    interested in the email address, so use IsAuthenticated instead
    of GetAuthenticatedUserEmail

Bug: none
Change-Id: If5de15711ef2d2d96dc935162b11aa17c4b245fe
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1569122
Commit-Queue: Sylvain Defresne <sdefresne@chromium.org>
Reviewed-by: Mihai Sardarescu <msarda@chromium.org>
Cr-Commit-Position: refs/heads/master@{#652542}