Have MakeProfileForUISignin accessible from tests
Have MakeProfileForUISignin accessible from tests

Signin E2E tests need the abilitiy to create profiles for signin with
real backend servers.

BUG=None

Review URL: https://codereview.chromium.org/1528143002

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#365592}

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