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This CL uses the callbacks used when the user tab an omnibox result
to switch to an open tab. It allows to record the same metrics as
desktop.

Bug: 906598
Change-Id: I12d848915b1a8a266d887d1eec11f71d2daef1a8
Reviewed-on: https://chromium-review.googlesource.com/c/1341538
Commit-Queue: Gauthier Ambard <gambard@chromium.org>
Reviewed-by: Eugene But <eugenebut@chromium.org>
Reviewed-by: Rohit Rao <rohitrao@chromium.org>
Reviewed-by: Stepan Khapugin <stkhapugin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#611082}