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The Lighting Estimation API has stabilized a little bit for the time
being; this change updates the test page with the API changes.

Change-Id: I770e0bb0e70e28e7373dbc650c5332247f6bb30d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2532772Reviewed-by: Brandon Jones <bajones@chromium.org>
Commit-Queue: Alexander Cooper <alcooper@chromium.org>
Cr-Commit-Position: refs/heads/master@{#827010}