Invalidate notification content view on update.

We need to recalculate the layout as the right content might add or
remove the icon view on update.

Bug: 937862
Change-Id: Ibc96cb0580c9fcd3f6446d5a969b63ed6dcbf5f4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1523391
Reviewed-by: Peter Beverloo <peter@chromium.org>
Reviewed-by: Yoshiki Iguchi <yoshiki@chromium.org>
Commit-Queue: Richard Knoll <knollr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#641129}
3 files changed