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- InfobarCoordinator now owns the InfobarContainerView.
- Creates a consumer protocol to communicate between InfobarContainerIOS and InfobarContainerView.
 Paving the way for a mediator.
- Deletes cr_transitionWithView in favor of the stock method since InfobarContainerView
 was the last class using it

Bug: 892376
Cq-Include-Trybots: luci.chromium.try:ios-simulator-cronet;luci.chromium.try:ios-simulator-full-configs
Change-Id: I5ed216e48096bf59ec485460dc42dab250177e01
Reviewed-on: https://chromium-review.googlesource.com/c/1287315
Commit-Queue: Sergio Collazos <sczs@chromium.org>
Reviewed-by: Mark Cogan <marq@chromium.org>
Cr-Commit-Position: refs/heads/master@{#600935}