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layout: Remove workaround for body while building overflow frame for StackingContextTree construction. (#38825)

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While building the stacking context tree we were assuming that `<body>`
would have propagated its `overflow` value to the viewport, and thus its
used `overflow` would be `visible`.

However, the element that propagates `overflow` can be the root element
instead. Since #38598 we are correctly taking this into account in
`effective_overflow()`, so we no longer need to do anything special in
the stacking context logic.

Testing: `css/css-overflow/overflow-body-propagation-012.html`

Fixes: #38799

Signed-off-by: Shubham Gupta <shubham13297@gmail.com>
This commit is contained in:
Shubham Gupta 2025-08-22 15:59:02 +08:00 • committed by GitHub
parent 4784ff0375
commit 09db6b8669
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4 changed files with 61 additions and 19 deletions
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17
tests/wpt/meta/MANIFEST.json vendored
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@ -231653,6 +231653,19 @@
{}
]
],
"overflow-body-propagation-012.html": [
"483b92e79b4f362e7cb6b5a8020103f48798b21a",
[
null,
[
[
"/css/css-overflow/overflow-body-propagation-012-ref.html",
"=="
]
],
{}
]
],
"overflow-canvas.html": [
"e9529cb0bc81202c5689a507435ea088028a97fc",
[
@ -446720,6 +446733,10 @@
"0d440ef20afa3d2456b702b2a1727a9f0717c4c1",
[]
],
"overflow-body-propagation-012-ref.html": [
"06b64c94334582ca9674f26648ef2be9c3c0e6c2",
[]
],
"overflow-canvas-ref.html": [
"3ad440e371906b2fa4bc2ec4ae5c430267cf11c1",
[]