Bug 1405335 - Remove custom element attached and detached callbacks validation checks

Tag UXP Issue #1344

dom/base/CustomElementRegistry.cpp

@@ -523,9 +523,7 @@ static const char* kLifeCycleCallbackNames[] = {
   "adoptedCallback",
   "attributeChangedCallback",
   // The life cycle callbacks from v0 spec.
-  "createdCallback",
-  "attachedCallback",
-  "detachedCallback"
+  "createdCallback"
 };
 
 static void

dom/tests/mochitest/webcomponents/test_custom_element_register_invalid_callbacks.html

@@ -20,8 +20,6 @@ const testWindow = iframe.contentDocument.defaultView;
 // We should do the same checks for the callbacks from v0 spec.
 [
   'createdCallback',
-  'attachedCallback',
-  'detachedCallback',
   'attributeChangedCallback',
 ].forEach(callback => {
   var c = class {};