1748734 - [wpt-sync] Sync PR 32258 - Ensure backdrop filter cc::Layers are marked as drawing content

Status: RESOLVED INVALID

(Core :: Web Painting, task, P4)

Description

[Web Platform Test Sync Bot [:wpt-sync] (Matrix: #interop:mozilla.org)]

Sync web-platform-tests PR 32258 into mozilla-central (this bug is closed when the sync is complete).

PR: https://github.com/web-platform-tests/wpt/pull/32258
Details from upstream follow.

Philip Rogers <[e-mail]> wrote:

Ensure backdrop filter cc::Layers are marked as drawing content

ContentLayerClientImpl::UpdateCcPictureLayer needs to set
cc::Layer::DrawsContent to true for content under a backdrop filter.
The previous code would do this based on the PendingLayer's effect node,
but this is incorrect if a single object has both a backdrop filter
effect node and a filter effect node. This approach failed to re-run
UpdateCcPictureLayer when HasBackdropEffect changed (see new WPT test
repaint-added-backdrop-filter.html).

This patch moves the source-of-truth for draws-content into PaintChunk,
and sets it based on whether any effect node could draw content.

Bug: 1273849
Change-Id: Ibb7c15361e83310881311122bf2cbec479a43d3a
Reviewed-on: https://chromium-review.googlesource.com/3367277
WPT-Export-Revision: d67783af903d4ea35b6fa0c3947e34a083daeb19