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The previous CL in this chain reveals trivial subdomain and scheme
when the URL is unelided on hover. This CL adds a hover animation to
the omnibox even before the user interacts with the page (in the
hide-on-interaction field trial). This allows the user to hover over
the omnibox to bring back the scheme and trivial subdomain even before
the URL has been elided to the simplified domain, thereby minimizing
the potential of having an edit bump before interacting the page as
well as after.

The main change is that we need to create the hover animation
earlier. Previously, we were creating it once the user interacts with
the page; now we create it on page load. Each elide/unelide operation
decides whether to use the full URL, partially elided URL (just scheme
and trivial subdomain hidden), or simplified domain based on whether
the user has interacted with the page yet or not.

Bug: 1101486
Change-Id: Id747929df56becadc34f0cb7a581494f4d90df5f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2291310
Commit-Queue: Emily Stark <estark@chromium.org>
Reviewed-by: Tommy Li <tommycli@chromium.org>
Cr-Commit-Position: refs/heads/master@{#788837}