A 'transform-box' change can yield a different transform

We wouldn't invalidate as needed if the 'transform-box' property changed
its value.

Bug: 595829
Change-Id: Ibcaa9e94b54b99724f2d3e1ca5dedd868d85b776
Reviewed-on: https://chromium-review.googlesource.com/796213
Reviewed-by: Stephen Chenney <schenney@chromium.org>
Commit-Queue: Fredrik Söderquist <fs@opera.com>
Cr-Commit-Position: refs/heads/master@{#520211}
2 files changed