AX ITM: Fix for accessibility/language-attribute-change.html in isola…

…ted tree mode. web content

https://bugs.webkit.org/show_bug.cgi?id=241794

Reviewed by Chris Fleizach.

* Source/WebCore/accessibility/AXObjectCache.cpp:
When the lang attribute changes, we need to update the object for which the attribute changed in addition to updating its children.
(WebCore::AXObjectCache::updateIsolatedTree):
* Tools/WebKitTestRunner/InjectedBundle/AccessibilityController.cpp:
(WTR::AccessibilityController::executeOnAXThreadAndWait):
Made the complete local variable std::atomic since it is accessed on and off the main thread.

Canonical link: https://commits.webkit.org/251690@main
git-svn-id: https://svn.webkit.org/repository/webkit/trunk@295685 268f45cc-cd09-0410-ab3c-d52691b4dbfc

Source/WebCore/accessibility/AXObjectCache.cpp

@@ -3588,11 +3588,11 @@ void AXObjectCache::updateIsolatedTree(const Vector<std::pair<RefPtr<AXCoreObjec
         case AXValueChanged:
             updateNode(notification.first);
             break;
+        case AXLanguageChanged:
         case AXRowCountChanged:
             updateNode(notification.first);
             FALLTHROUGH;
         case AXChildrenChanged:
-        case AXLanguageChanged:
         case AXRowCollapsed:
         case AXRowExpanded: {
             auto updatedFields = updatedObjects.get(notification.first->objectID());

Tools/WebKitTestRunner/InjectedBundle/AccessibilityController.cpp

@@ -106,7 +106,7 @@ void AccessibilityController::executeOnAXThreadAndWait(Function<void()>&& functi
 {
 #if ENABLE(ACCESSIBILITY_ISOLATED_TREE)
     if (m_useMockAXThread) {
-        bool complete = false;
+        std::atomic<bool> complete = false;
         AXThread::dispatch([&function, &complete] {
             function();
             complete = true;