GitLab

Separate logic of calculating target bounds and actually updating
layout.

Bug: 1047012, 1042918, 1056514
Change-Id: Iffba0d8b691ed45a04447274a3e8ed174268c70c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2076421
Commit-Queue: Manu Cornet <manucornet@chromium.org>
Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#745207}