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This is mostly a straight restore into mandoline/ui/aura (combined the needed views files in there) but had to bring a few things up to date with the state of Mojo SDK now, e.g. declienting etc.

R=sky@chromium.org
BUG=

Review URL: https://codereview.chromium.org/1123643007

Cr-Commit-Position: refs/heads/master@{#328290}