The toolbar icon is a visible indicator to the user that an extension is installed. Thus, a bad actor can attempt to hide the icon to disguise its presence. In addition, the icon allows the user an easy way to uninstall it.

Bug: 805600
Change-Id: I178901d03b8ce6b13b70932114bbf9747890ae9d
Reviewed-on: https://chromium-review.googlesource.com/1144253
Commit-Queue: David Bertoni <dbertoni@chromium.org>
Reviewed-by: Devlin <rdevlin.cronin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#577057}