[ios] Create InfoBarBadgeView

This view will replace the current implementation of leadingButton
in LocationBarSteadyView.

Bug: 954624
Change-Id: I5039daa918a1e93eed8c3192b6960754985b8f55
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1574742
Commit-Queue: Chris Lu <thegreenfrog@chromium.org>
Reviewed-by: Sergio Collazos <sczs@chromium.org>
Cr-Commit-Position: refs/heads/master@{#653701}
3 files changed