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This CL adds animations when the user is tapping the "switch to this
tab" indicator in the omnibox suggestions.

Bug: 893121
Change-Id: Ia7af97f6175efa959bbb2e84ab5661f00adedf81
Reviewed-on: https://chromium-review.googlesource.com/c/1322871Reviewed-by: Mark Cogan <marq@chromium.org>
Commit-Queue: Gauthier Ambard <gambard@chromium.org>
Cr-Commit-Position: refs/heads/master@{#607174}