Remove check for valid account info in ChildAccountService.
IsValid() is a bit too strict for our purposes here, as the AccountInfo is
considered invalid if the UserInfo request failed, which would then disable
child account detection. In addition, the flag we are interested in (is_child_account) is the only thing that AccountInfo::IsValid() does _not_ consider, so the return value really has nothing to do with what we want.
BUG=543133
Review URL: https://codereview.chromium.org/1401873004
Cr-Commit-Position: refs/heads/master@{#354786}
1 file changed
