Bug 1719239 - Disable support for content:none on elements due to webcompat issues. r=emilio

Differential Revision: https://phabricator.services.mozilla.com/D119188

layout/style/test/property_database.js

@@ -5256,9 +5256,8 @@ var gCSSProperties = {
     type: CSS_TYPE_LONGHAND,
     applies_to_marker: true,
     // XXX This really depends on pseudo-element-ness.
-    initial_values: ["normal"],
+    initial_values: ["normal", "none"],
     other_values: [
-      "none",
       '""',
       "''",
       '"hello"',

modules/libpref/init/StaticPrefList.yaml

@@ -7521,7 +7521,7 @@
 # Is 'content:none' supported on (non-pseudo) elements?
 - name: layout.css.element-content-none.enabled
   type: RelaxedAtomicBool
-  value: true
+  value: false
   mirror: always
   rust: true
 

testing/web-platform/meta/css/css-content/content-none-details.html.ini

@@ -0,0 +1,2 @@
+[content-none-details.html]
+  prefs: [layout.css.element-content-none.enabled:true]

testing/web-platform/meta/css/css-content/content-none-fieldset.html.ini

@@ -1,3 +1,4 @@
 [content-none-fieldset.html]
+  prefs: [layout.css.element-content-none.enabled:true]
   fuzzy: # anti-aliasing color differences inside scrollbars
     maxDifference=0-4;totalPixels=0-200

testing/web-platform/meta/css/css-content/content-none-math.html.ini

@@ -0,0 +1,2 @@
+[content-none-math.html]
+  prefs: [layout.css.element-content-none.enabled:true]

testing/web-platform/meta/css/css-content/content-none-option.html.ini

@@ -0,0 +1,2 @@
+[content-none-option.html]
+  prefs: [layout.css.element-content-none.enabled:true]

testing/web-platform/meta/css/css-content/content-none-root-block.html.ini

@@ -0,0 +1,2 @@
+[content-none-root-block.html]
+  prefs: [layout.css.element-content-none.enabled:true]

testing/web-platform/meta/css/css-content/content-none-root-columns.html.ini

@@ -0,0 +1,2 @@
+[content-none-root-columns.html]
+  prefs: [layout.css.element-content-none.enabled:true]

testing/web-platform/meta/css/css-content/content-none-root-flex.html.ini

@@ -0,0 +1,2 @@
+[content-none-root-flex.html]
+  prefs: [layout.css.element-content-none.enabled:true]

testing/web-platform/meta/css/css-content/content-none-root-grid.html.ini

@@ -0,0 +1,2 @@
+[content-none-root-grid.html]
+  prefs: [layout.css.element-content-none.enabled:true]

testing/web-platform/meta/css/css-content/content-none-root-ruby.html.ini

@@ -0,0 +1,2 @@
+[content-none-root-ruby.html]
+  prefs: [layout.css.element-content-none.enabled:true]

testing/web-platform/meta/css/css-content/content-none-root-table.html.ini

@@ -0,0 +1,2 @@
+[content-none-root-table.html]
+  prefs: [layout.css.element-content-none.enabled:true]

testing/web-platform/meta/css/css-content/content-none-select-1.html.ini

@@ -0,0 +1,2 @@
+[content-none-select-1.html]
+  prefs: [layout.css.element-content-none.enabled:true]

testing/web-platform/meta/css/css-content/content-none-select-2.html.ini

@@ -0,0 +1,2 @@
+[content-none-select-2.html]
+  prefs: [layout.css.element-content-none.enabled:true]

testing/web-platform/meta/css/css-content/content-none-span-dynamic.html.ini

@@ -0,0 +1,2 @@
+[content-none-span-dynamic.html]
+  prefs: [layout.css.element-content-none.enabled:true]

testing/web-platform/meta/css/css-content/content-none-span.html.ini

@@ -0,0 +1,2 @@
+[content-none-span.html]
+  prefs: [layout.css.element-content-none.enabled:true]

testing/web-platform/meta/css/css-content/content-none-table.html.ini

@@ -0,0 +1,2 @@
+[content-none-table.html]
+  prefs: [layout.css.element-content-none.enabled:true]