GitLab

DCLayerOverlayProcessor supports non-root with a disabled by default
finch flag. This hasn't shipped in the last 3+ years and it's unlikely
it would ever ship in the current form. Meanwhile, any refactoring of
the overlay processor for implementing real performance optimizations
like partial quad aggregation becomes a lot more complicated due to
handling the corner case of non-root render passes.

Also remove support for non axis-aligned transforms since those rely on
non-root render pass support as well.  Remove the misleading unit tests
for non axis-aligned transforms since those only test video quads in
root render pass which doesn't occur in practice since non axis-aligned
video surfaces don't get merged to the root render pass.

Bug: 1100690, 1077210
Change-Id: Idc012d29d9e4effd3b3e4194ad0cfcdf9083d71f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2277321Reviewed-by: Zhenyao Mo <zmo@chromium.org>
Reviewed-by: Maggie Chen <magchen@chromium.org>
Commit-Queue: Sunny Sachanandani <sunnyps@chromium.org>
Cr-Commit-Position: refs/heads/master@{#785906}