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Plus some refactoring to favor composition over inheritance for click_to_call_icon_view.
Recording of the change:(check the omnibox icon and message on 0:12 sec)
https://drive.google.com/file/d/18wxoxYDW6U8fKEmDcRnlYass5I_0sy7U/view


Bug: 994704
Change-Id: I2124794f11e5060f5c233966aa49eedb9b6b97bc
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1768349
Commit-Queue: Yasmin Molazadeh <yasmo@chromium.org>
Reviewed-by: Evan Stade <estade@chromium.org>
Reviewed-by: Peter Beverloo <peter@chromium.org>
Reviewed-by: Alex Chau <alexchau@chromium.org>
Cr-Commit-Position: refs/heads/master@{#691718}