Bug 1803435 - Enable scrollend for content by default. r=hiro,botond,emilio

Enable firing the scrollend event to content by default.

Differential Revision: https://phabricator.services.mozilla.com/D163801

dom/tests/mochitest/general/test_interfaces.js

@@ -1684,6 +1684,8 @@ let interfaceNamesInGlobalScope = [
   // IMPORTANT: Do not change this list without review from a DOM peer!
   { name: "onscroll", insecureContext: true },
   // IMPORTANT: Do not change this list without review from a DOM peer!
+  { name: "onscrollend", insecureContext: true },
+  // IMPORTANT: Do not change this list without review from a DOM peer!
   { name: "onsecuritypolicyviolation", insecureContext: true },
   // IMPORTANT: Do not change this list without review from a DOM peer!
   { name: "onseeked", insecureContext: true },

modules/libpref/init/StaticPrefList.yaml

@@ -298,7 +298,7 @@
 
 - name: apz.scrollend-event.content.enabled
   type: RelaxedAtomicBool
-  value: false
+  value: true
   mirror: always
 
 # After a user has executed a pan gesture, we may receive momentum phase pan

testing/web-platform/meta/html/dom/idlharness.https.html.ini

@@ -443,9 +443,6 @@ prefs: [dom.security.featurePolicy.experimental.enabled:true, dom.security.featu
   [Navigator interface: window.navigator must inherit property "userActivation" with the proper type]
     expected: FAIL
 
-  [SVGElement interface: attribute onscrollend]
-    expected: FAIL
-
 
 [idlharness.https.html?include=(Document|Window)]
   expected:
@@ -536,24 +533,6 @@ prefs: [dom.security.featurePolicy.experimental.enabled:true, dom.security.featu
   [Document interface: documentWithHandlers must inherit property "onbeforematch" with the proper type]
     expected: FAIL
 
-  [Window interface: attribute onscrollend]
-    expected: FAIL
-
-  [Window interface: window must inherit property "onscrollend" with the proper type]
-    expected: FAIL
-
-  [Document interface: attribute onscrollend]
-    expected: FAIL
-
-  [Document interface: iframe.contentDocument must inherit property "onscrollend" with the proper type]
-    expected: FAIL
-
-  [Document interface: new Document() must inherit property "onscrollend" with the proper type]
-    expected: FAIL
-
-  [Document interface: documentWithHandlers must inherit property "onscrollend" with the proper type]
-    expected: FAIL
-
 
 [idlharness.https.html?include=HTML.*]
   prefs: [dom.dialog_element.enabled:true]
@@ -750,9 +729,3 @@ prefs: [dom.security.featurePolicy.experimental.enabled:true, dom.security.featu
 
   [HTMLElement interface: document.createElement("noscript") must inherit property "onbeforematch" with the proper type]
     expected: FAIL
-
-  [HTMLElement interface: attribute onscrollend]
-    expected: FAIL
-
-  [HTMLElement interface: document.createElement("noscript") must inherit property "onscrollend" with the proper type]
-    expected: FAIL

testing/web-platform/meta/html/webappapis/scripting/events/event-handler-all-global-events.html.ini

@@ -48,12 +48,3 @@
 
   [onbeforematch: the content attribute must execute when an event is dispatched]
     expected: FAIL
-
-  [onscrollend: must be on the appropriate locations for GlobalEventHandlers]
-    expected: FAIL
-
-  [onscrollend: the default value must be null]
-    expected: FAIL
-
-  [onscrollend: the content attribute must be compiled into a function as the corresponding property]
-    expected: FAIL

testing/web-platform/meta/html/webappapis/scripting/events/event-handler-attributes-body-window.html.ini

@@ -73,12 +73,3 @@
 
   [not shadowed beforematch (document.body)]
     expected: FAIL
-
-  [not shadowed scrollend (window)]
-    expected: FAIL
-
-  [not shadowed scrollend (document.createElement("body"))]
-    expected: FAIL
-
-  [not shadowed scrollend (document.body)]
-    expected: FAIL

testing/web-platform/meta/html/webappapis/scripting/events/event-handler-attributes-frameset-window.html.ini

@@ -61,12 +61,3 @@
 
   [not shadowed beforematch (document.body)]
     expected: FAIL
-
-  [not shadowed scrollend (document.createElement("frameset"))]
-    expected: FAIL
-
-  [not shadowed scrollend (window)]
-    expected: FAIL
-
-  [not shadowed scrollend (document.body)]
-    expected: FAIL

testing/web-platform/meta/html/webappapis/scripting/events/event-handler-attributes-windowless-body.html.ini

@@ -22,9 +22,3 @@
 
   [beforematch is unaffected on a windowless frameset]
     expected: FAIL
-
-  [scrollend is unaffected on a windowless body]
-    expected: FAIL
-
-  [scrollend is unaffected on a windowless frameset]
-    expected: FAIL

testing/web-platform/meta/mathml/relations/html5-tree/math-global-event-handlers.tentative.html.ini

@@ -58,18 +58,3 @@
 
   [onbeforematch: dispatching an Event at a <math> element must trigger element.onbeforematch]
     expected: FAIL
-
-  [onscrollend: must be on the appropriate locations for GlobalEventHandlers]
-    expected: FAIL
-
-  [onscrollend: the default value must be null]
-    expected: FAIL
-
-  [onscrollend: the content attribute must be compiled into a function as the corresponding property]
-    expected: FAIL
-
-  [onscrollend: dynamic changes on the attribute]
-    expected: FAIL
-
-  [onscrollend: dispatching an Event at a <math> element must trigger element.onscrollend]
-    expected: FAIL