зеркало из https://github.com/mozilla/gecko-dev.git
2641cbd682
With container scrolling, layers that are fixed wrt. the RCD-RSF are no
longer descendants of layers with RCD-RSF metadata. This allows us to remove
some code that handles this case in AsyncCompositionManager.
In particular, when ApplyAsyncContentTransformToTree() calls
AlignFixedAndStickyLayers():
- If we are currently processing a layer with RCD-RSF metadata,
AlignFixedAndStickyLayers() will not do anything (because there will be
no descendants fixed wrt. the RCD-RSF), so it doesn't matter what
transform we pass to AlignFixedAndStickyLayers().
- If we are processing a different layer, then Metrics().IsRootContent()
will be false, so GetCurrentAsyncTransformForFixedAdjustment()
simplifies to just GetCurrentAsyncTransform().
As a result, GetCurrentAsyncTransformForFixedAdjustment() (and its helper
GetCurrentAsyncViewportTransform()) can be removed, and its use replaced
with GetCurrentAsyncTransform().
Differential Revision: https://phabricator.services.mozilla.com/D45595
--HG--
extra : moz-landing-system : lando
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