Revert "Bug 1941406: Enable support for the ::details-content pseudo-element. r=emilio" for causing reftest failures on details-percentage-height-children.html

This reverts commit 760bd6c.

Revert "Bug 1941406: Remove the Nightly-only guard from about:config pref "layout.details.force-block-layout". r=layout-reviewers,emilio"

This reverts commit 0677021.

Author: chorotan

layout/reftests/details-summary/details-percentage-height-children.html

@@ -9,10 +9,6 @@
     width: 500px;
     height: 300px;
   }
-  ::details-content {
-    /* Ensure content doesn't prevent div spanning height */
-    display: contents;
-  }
   summary {
     /* Hide the triangle for comparing with div in reftest. */
     list-style-type: none;

modules/libpref/init/StaticPrefList.yaml

@@ -10715,7 +10715,7 @@
 # Is support for the ::details-content pseudo-element enabled?
 - name: layout.css.details-content.enabled
   type: RelaxedAtomicBool
-  value: true
+  value: false
   mirror: always
   rust: true
 
@@ -10856,7 +10856,7 @@
 # The modern behavior is 'false', i.e. not forcing it to be a block.
 - name: layout.details.force-block-layout
   type: bool
-  value: false
+  value: @IS_NOT_NIGHTLY_BUILD@
   mirror: always
 
 # Whether table cells can generate scroll boxes.

testing/web-platform/meta/css/css-conditional/__dir__.ini

@@ -1,2 +1,2 @@
-prefs: [layout.css.scroll-state.enabled:true]
+prefs: [layout.css.details-content.enabled:true, layout.css.scroll-state.enabled:true]
 leak-threshold: [default:51200]

testing/web-platform/meta/css/css-conditional/js/__dir__.ini

@@ -1 +1,2 @@
+prefs: [layout.css.details-content.enabled:true]
 leak-threshold: [default:51200]

testing/web-platform/meta/css/css-scoping/__dir__.ini

@@ -0,0 +1 @@
+prefs: [layout.css.details-content.enabled:true]

testing/web-platform/meta/css/css-shadow-parts/__dir__.ini

@@ -1 +1 @@
-prefs: [dom.viewTransitions.enabled:true]
+prefs: [layout.css.details-content.enabled:true, dom.viewTransitions.enabled:true]

testing/web-platform/meta/html/rendering/the-details-element/__dir__.ini

@@ -1 +1,2 @@
+prefs: [layout.details.force-block-layout:false,layout.css.details-content.enabled:true]
 leak-threshold: [default:51200]