GitLab

This patch makes will-change: filter a compositing reason. The approach
is similar to will-change: transform where filter changes do not cause
DiffNeedsFullLayoutAndPaintInvalidation (see change in
computed_style_diff_functions.json5). LBMO::StyleDidChange is
used to invalidate when the will-change property changes.

Bug: 960953
Change-Id: I7600c141baf11d1e10fae229a6261926c44923fd
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2145466
Commit-Queue: Philip Rogers <pdr@chromium.org>
Reviewed-by: Xianzhu Wang <wangxianzhu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#758501}