The two elements should be Y-centered.
The top alignment should still be fixed to have the center alignment even if the elements have different sizes.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/d3c34ebdebc059faa1d7e4d936407bd759c00ec2

commit d3c34ebdebc059faa1d7e4d936407bd759c00ec2
Author: gambard <gambard@chromium.org>
Date: Tue Jul 25 12:38:02 2017

Change ContentSuggestions favicon top alignment

The additional information and the favicon should be able to be center
aligned, even if they don't have the same height.
For now it worked because they have the same height.

Bug:  740530 
Change-Id: Ib4e1acd022cb03635ba5fade1310fc2b2b01ad8d
Reviewed-on: https://chromium-review.googlesource.com/584587
Reviewed-by: Elodie Banel <lod@chromium.org>
Commit-Queue: Gauthier Ambard <gambard@chromium.org>
Cr-Commit-Position: refs/heads/master@{#489280}
[modify] https://crrev.com/d3c34ebdebc059faa1d7e4d936407bd759c00ec2/ios/chrome/browser/ui/content_suggestions/cells/content_suggestions_cell.mm

Verified in 62.0.3173.0 canary, iPhone6 plus iOS 10.3.3, iPhone7 iOS11, iPad Pro iOS11

The favicon and the publisher info are left aligned.

https://drive.google.com/a/google.com/file/d/0B3EcbqLuR5TLNGJYRE1mb1F2c0U/view
Looks good