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Due to a mistake in refactoring, the EULA was never marked as read, and
the location pop-up was never shown. Fix these by moving relevant code
to scene controller.

It seems like running this code multiple times (if multiwindow is used
in FRE) is safe and will not cause issues.

Bug: 1145063
Change-Id: If61e1fdb75b8cf6e1743c543d4570279f1f7a2d0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2517953
Auto-Submit: Stepan Khapugin <stkhapugin@chromium.org>
Reviewed-by: Mark Cogan <marq@chromium.org>
Commit-Queue: Stepan Khapugin <stkhapugin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#824034}